The interpretation timeline
Genesis 19:26 Douay-Rheims

And his wife looking behind her, was turned into a statue of salt.

A.D. 99 – 1875 12 witnesses

Patristic

before A.D. 750
99
A.D.
Clement of Rome Patristic
d. A.D. 99
“On account of his hospitality and godliness, Lot was saved out of Sodom when all the country round was punished by means of fire and brimstone, the Lord thus making it manifest that He does not forsake those that hope in Him, but gives up such as depart from Him to punishment and torture. [Genesis 19:15-26, 2 Peter 2:6-9] For Lot's wife, who went forth with him, being of a different mind from himself, and not continuing in agreement with him [as to the command which had been given them], was made an example of, so as to be a pillar of salt unto this day. This was done that all might know that those who are of a double mind, and who distrust the power of God, bring down judgment on themselves and become a sign to all succeeding generations.”
Source
215
A.D.
c. A.D. 150–215
“For God looks closely at the actual inner purpose, as when Lot's wife was the only one to turn of her own free will toward the wickedness of the world. He left her insensible, giving her the likeness of a pillar of salt and leaving her without the power of forward movement, a statue, yet not one without a useful message but one intended to season and salt the person capable of spiritual perception.”
Source
523
A.D.
c. A.D. 450–523
“Remember Lot's wife, who, because the love of her kinsfolk and the outcries of her beloved ones constrained her, turned and looked back behind her, and became a pillar of salt, even as is written concerning her; and because her soul had not been salted with the fear of the Highest she became a destructible salted thing. Remember then this woman who was in doubt, and who perished, and be thou not in doubt like unto her, and turn not thyself backwards, lest thou remain in the place where thou art. For the soul that turneth and looketh backward after it hath gone forth on the journey in this path becometh a senseless pillar, and as the wife of Lot ceased from bodily feeling, and thereby became a pillar of salt, even so also here the mind, which looketh behind it always at corruptible things, ceaseth to feel, and becometh stupefied at spiritual things; because the remembrance of the world maketh us to possess dulness of heart, and it defileth the purity and innocency of the soul.”
Source

Scholastic

c. 1100 – 1500
1105
A.D.
Rashi Jewish
1040–1105
ותבט אשתו מאחריו AND HIS WIFE LOOKED BACK FROM BEHIND HIM —behind Lot. ותהי נציב מלח AND SHE BECAME A PILLAR OF SALT — By salt had she sinned and by salt was she punished. He (Lot) said to her once: “Give a little salt to these strangers” and she answered him, “Do you mean to introduce this bad custom, also, into our city?” (Genesis Rabbah 50:4).”
Source
1270
A.D.
Ramban Jewish
1194–1270
“AND HIS WIFE LOOKED BACK FROM BEHIND HIM. From behind Lot, who was following them, acting as the rearguard for all his household, who were hurrying to be saved.”

Post-Reformation

c. 1650 – 1900
1714
A.D.
Matthew Henry Reformed
1662–1714
“This also is written for our admonition. Our Saviour refers to it (Luk 17:32), Remember Lot's wife. As by the example of Sodom the wicked are warned to turn from their wickedness, so by the example of Lot's wife the righteous are warned not to turn from their righteousness. See Eze 3:18, Eze 3:20. We have here, I. The sin of Lot's wife: She looked back from behind him. This seemed a small thing, but we are sure, by the punishment of it, that it was a great sin, and exceedingly sinful. 1. She disobeyed an express command, and so sinned after the similitude of Adam's transgression, which ruined us all. 2. Unbelief was at the bottom of it; she questioned whether Sodom would be destroyed, and thought she might still have been safe in it. 3. She looked back upon her neighbours whom she had left behind with more concern than was fit, now that their day of grace was over, and divine justice was glorifying itself in their ruin. See Isa 66:24. 4. Probably she hankered after her house and goods in Sodom, and was loth to leave them. Christ intimates this to be her sin (Luk 17:31, Luk 17:32); she too much regarded her stuff. 5. Her looking back evinced an inclination to go back; and therefore our Saviour uses it as a warning against apostasy from our Christian profession. We have all renounced the world and the flesh, and have set our faces heaven-ward; we are in the plain, upon our probation; and it is at our peril if we return into the interests we profess to have abandoned. Drawing back is to perdition, and looking back is towards it. Let us therefore fear, Heb 4:1. II. The punishment of Lot's wife for this sin. She was struck dead in the place; yet her body did not fall down, but stood fixed and erect like a pillar, or monument, not liable to waste nor decay, as human bodies exposed to the air are, but metamorphosed into a metallic substance which would last perpetually. Come, behold the goodness and severity of God (Rom 11:22), towards Lot, who went forward, goodness; towards his wife, who looked back, severity. Though she was nearly related to a righteous man, though better than her neighbours, and though a monument of distinguishing mercy in her deliverance out of Sodom, yet God did not connive at her disobedience; for great privileges will not secure us from the wrath of God if we do not carefully and faithfully improve them. This pillar of salt should season us. Since it is such a dangerous thing to look back, let us always press forward, Phi 3:13, Phi 3:14.”
Source
1771
A.D.
John Gill Reformed
1697–1771
“And Abraham got up early in the morning,.... Perhaps he had had but little sleep the whole night, his thoughts being taken up with what was to befall the cities of the plain; and especially being in great concern for Lot and his family: to the place where he stood before the Lord; Gen 18:22; to the very spot of ground where he had stood the day before in the presence of the Lord, and had conversed with him, and prayed unto him; and so the Targum of Jonathan,"to the place where he ministered in prayer before the Lord;''here he came and stood waiting for an answer to his prayers; and perhaps this place was an eminence, from whence he could have a view of the plain of Jordan and the cities on it; and so it appears from Gen 19:28.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“She became a pillar of salt - The vast variety of opinions, both ancient and modern, on the crime of Lot's wife, her change, and the manner in which that change was effected, are in many cases as unsatisfactory as they are ridiculous. On this point the sacred Scripture says little. God had commanded Lot and his family not to look behind them; the wife of Lot disobeyed this command; she looked back from behind him - Lot, her husband, and she became a pillar of salt. This is all the information the inspired historian has thought proper to give us on this subject; it is true the account is short, but commentators and critics have made it long enough by their laborious glosses. The opinions which are the most probable are the following: 1. "Lot's wife, by the miraculous power of God, was changed into a mass of rock salt, probably retaining the human figure." 2. "Tarrying too long in the plain, she was struck with lightning and enveloped in the bituminous and sulphuric matter which abounded in that country, and which, not being exposed afterwards to the action of the fire, resisted the air and the wet, and was thus rendered permanent." 3. "She was struck dead and consumed in the burning up of the plain; and this judgment on her disobedience being recorded, is an imperishable memorial of the fact itself, and an everlasting warning to sinners in general, and to backsliders or apostates in particular." On these opinions it may be only necessary to state that the two first understand the text literally, and that the last considers it metaphorically. That God might in a moment convert this disobedient woman into a pillar or mass of salt, or any other substance, there can be no doubt. Or that, by continuing in the plain till the brimstone and fire descended from heaven, she might be struck dead with lightning, and indurated or petrified on the spot, is as possible. And that the account of her becoming a pillar of salt may be designed to be understood metaphorically, is also highly probable. It is certain that salt is frequently used in the Scriptures as an emblem of incorruption, durability, etc. Hence a covenant of salt, Num 18:19, is a perpetual covenant, one that is ever to be in full force, and never broken; on this ground a pillar of salt may signify no more in this case than an everlasting monument against criminal curiosity, unbelief, and disobedience. Could we depend upon the various accounts given by different persons who pretend to have seen the wife of Lot standing in her complete human form, with all her distinctive marks about her, the difficulty would be at an end. But we cannot depend on these accounts; they are discordant, improbable, ridiculous, and often grossly absurd. Some profess to have seen her as a heap of salt; others, as a rock of salt; others, as a complete human being as to shape, proportion of parts, etc., etc., but only petrified. This human form, according to others, has still resident in it a miraculous continual energy; break off a finger, a toe, an arm, etc., it is immediately reproduced, so that though multitudes of curious persons have gone to see this woman, and every one has brought away a part of her, yet still she is found by the next comer a complete human form! To crown this absurd description, the author of the poem De Sodoma, usually attributed to Tertullian, and annexed to his works, represents her as yet instinct with a portion of animal life, which is unequivocally designated by certain signs which every month produces. I shall transcribe the whole passage and refer to my author; and as I have given above the sense of the whole, my readers must excuse me from giving a more literal translation: - - et simul illic In fragilem mutata salem, stetit ipsa sepulchrum, Ipsaque imago sibi, formam sine corpore servans Durat adhuc etenim nuda statione sub aethra, Nec pluviis dilapsa situ, nec diruta ventis. Quinettam, si quis mutilaverit advena formam, Protinus ex sese suggestu vulnera complet. Dicitur et vivens alio sub corpore sexus Munificos solito dispungere sanguine menses Teetulliani Opera, vol. ii., p. 731. Edit. Oberthur. The sentiment in the last lines is supported by Irenaeus, who assures us that, though still remaining as a pillar of salt, the statue, in form and other natural accidents, exhibits decisive proofs of its original. Jam non caro corruptibilis, sed statua salis semper manens, et, per naturalla, ea quoe sunt consuetudinis hominis ostendens, lib. iv., c. 51. To complete this absurdity, this father makes her an emblem of the true Church, which, though she suffers much, and often loses whole members, yet preserves the pillar of salt, that is, the foundation of the true faith, etc. See Calmet. Josephus says that this pillar was standing in his time, and that himself had seen it: Εις στηλην ἁλων μετεβαλεν, ἱοτορηκα δ' αυτην· ετι γαρ και νυν διαμενει. Ant. lib. i., c. xi. 3, 4. St. Clement, in his First Epistle to the Corinthians, chap. 2, follows Josephus, and asserts that Lot's wife was remaining even at that time as a pillar of salt. Authors of respectability and credit who have since traveled into the Holy Land, and made it their business to inquire into this subject in the most particular and careful manner, have not been able to meet with any remains of this pillar; and all accounts begin now to be confounded in the pretty general concession, both of Jews and Gentiles, that either the statue does not now remain, or that some of the heaps of salt or blocks of salt rock which are to be met with in the vicinity of the Dead Sea, may be the remains of Lot's wife! All speculations on this subject are perfectly idle; and if the general prejudice in favor of the continued existence of this monument of God's justice had not been very strong, I should not have deemed myself justified in entering so much at length into the subject. Those who profess to have seen it, have in general sufficiently invalidated their own testimony by the monstrous absurdities with which they have encumbered their relations. Had Lot's wife been changed in the way that many have supposed, and had she been still preserved somewhere in the neighborhood of the Dead Sea, surely we might expect some account of it in after parts of the Scripture history; but it is never more mentioned in the Bible, and occurs nowhere in the New Testament but in the simple reference of our Lord to the judgment itself, as a warning to the disobedient and backsliding, Luk 17:32 : Remember Lot's wife!”
1849
A.D.
1774–1849
“And his wife. As a standing memorial to the servants of God to proceed in virtue, and not to look back to vice or its allurements. (Challoner) — His, Lot’s wife. The two last verses might be within a parenthesis. — Remember Lot’s wife, our Saviour admonishes us. Having begun a good work, let us not leave it imperfect, and lose our reward. (Luke xvii; Matthew xxiv.) — A statue of durable metallic salt, petrified as it were, to be an eternal monument of an incredulous soul, Wisdom x. 7. Some say it still exists. (Haydock) — God may have inflicted this temporal punishment on her, and saved her soul. (Menochius) — She looked back, as if she distrusted the words of the angel; but her fault was venial. (Tirinus)”
Source
1863
A.D.
1796–1863
“Luke 17 : 32. In punishment of her disobedience, the wife of Lot, on turning to view the smoking ruins, was stricken dead. She appears to have been petrified by the sudden accumulation of bituminous and sulphurous particles. The Book of Wisdom speaks of the pillar of salt as a permanent monument of an incredulous soul. 7 : 10.”
Source
1871
A.D.
1871
“Lot was accompanied by his wife and two daughters. But whether it was from irresistible curiosity or perturbation of feeling, or that she was about to return to save something, his wife lingered, and while thus disobeying the parting counsel, "to look not back, nor stay in all the plain" [Gen 19:17], the torrent of liquid lava enveloped her so that she became the victim of her supine indolence or sinful rashness.”
Source
1875
A.D.
Keil & Delitzsch Lutheran
1861–1875
“On the way, Lot's wife, notwithstanding the divine command, looked "behind him away," - i.e., went behind her husband and looked backwards, probably from a longing for the house and the earthly possessions she had left with reluctance (cf. Luk 17:31-32), - and "became a pillar of salt." We are not to suppose that she was actually turned into one, but having been killed by the fiery and sulphureous vapour with which the air was filled, and afterwards encrusted with salt, she resembled an actual statue of salt; just as even now, from the saline exhalation of the Dead Sea, objects near it are quickly covered with a crust of salt, so that the fact, to which Christ refers in Luk 17:32, may be understood without supposing a miracle. (Note: But when this pillar of salt is mentioned in Wis. 11:7 and Clemens ad Cor. xi. as still in existence, and Josephus professes to have seen it, this legend is probably based upon the pillar-like lumps of salt, which are still to be seen at Mount Usdum (Sodom), on the south-western side of the Dead Sea.) - In Gen 19:27, Gen 19:28, the account closes with a remark which points back to Gen 18:17., viz., that Abraham went in the morning to the place where he had stood the day before, interceding with the Lord for Sodom, and saw how the judgment had fallen upon the entire plain, since the smoke of the country went up like the smoke of a furnace. Yet his intercession had not been in vain.”
Source
Modern · 1953 →

The in-app commentary runs from the Fathers to the early-modern record, then stops — that's where the public-domain sources end, not where the reading does. For the modern reading, follow the sources directly.