The interpretation timeline
Revelation 1:12 Douay-Rheims

And I turned to see the voice that spoke with me. And being turned, I saw seven golden candlesticks:

A.D. 202 – 1871 8 witnesses

Patristic

before A.D. 750
202
A.D.
Irenaeus Patristic
c. A.D. 130–202
“If, then, neither Moses, nor Elias, nor Ezekiel, who had all many celestial visions, did see God; but if what they did see were similitudes of the splendour of the Lord, and prophecies of things to come; it is manifest that the Father is indeed invisible, of whom also the Lord said, "No man hath seen God at any time." But His Word, as He Himself willed it, and for the benefit of those who beheld, did show the Father's brightness, and explained His purposes (as also the Lord said: "The only-begotten God, which is in the bosom of the Father, He hath declared [Him];" and He does Himself also interpret the Word of the Father as being rich and great); not in one figure, nor in one character, did He appear to those seeing Him, but according to the reasons and effects aimed at in His dispensations, as it is written in Daniel. For at one time He was seen with those who were around Ananias, Azarias, Misael, as present with them in the furnace of fire, in the burning, and preserving them from [the effects of] fire: "And the appearance of the fourth," it is said, "was like to the Son of God." At another time [He is represented as] "a stone cut out of the mountain without hands," and as smiting all temporal kingdoms, and as blowing them away, and as Himself filling all the earth. Then, too, is this same individual beheld as the Son of man coming in the clouds of heaven, and drawing near to the Ancient of Days, and receiving from Him all power and glory, and a kingdom. "His dominion," it is said, "is an everlasting dominion, and His kingdom shall not perish." John also, the Lord's disciple, when beholding the sacerdotal and glorious advent of His kingdom, says in the Apocalypse: "I turned to see the voice that spake with me. And, being turned, I saw seven golden candlesticks; and in the midst of the candlesticks One like unto the Son of man, clothed with a garment reaching to the feet, and girt about the paps with a golden girdle; and His head and His hairs were white, as white as wool, and as snow; and His eyes were as a flame of fire; and His feet like unto fine brass, as if He burned in a furnace. And His voice [was] as the voice of waters; and He had in His right hand seven stars; and out of His mouth went a sharp two-edged sword; and His countenance was as the sun shining in his strength." For in these words He sets forth something of the glory [which He has received] from His Father, as [where He makes mention of] the head; something in reference to the priestly office also, as in the case of the long garment reaching to the feet. And this was the reason why Moses vested the high priest after this fashion. Something also alludes to the end [of all things], as [where He speaks of] the fine brass burning in the fire, which denotes the power of faith, and the continuing instant in prayer, because of the consuming fire which is to come at the end of time.”
Source
258
A.D.
Cyprian Patristic
c. A.D. 200–258
“That after He had risen again He should receive from His Father all power, and His power should be everlasting. In Daniel: "I saw in a vision by night, and behold as it were the Son of man, coming in the clouds of heaven, came even to the Ancient of days, and stood in His sight. And they who stood beside Him brought Him before Him: and to Him was given a royal power, and all the kings of the earth by their generation, and all glory obeying Him: and His power is eternal, which shall not be taken away, and His kingdom shall not be destroyed." Also in Isaiah: "Now will I arise, saith the Lord; now will I be glorified, now will I be exalted, now ye shall see, now ye shall understand, now ye shall be confounded. Vain will be the strength of your spirit: the fire shall consume you." Also in the cixth Psalm: "The Lord said unto my Lord, Sit Thou on my fight hand, until I make Thine enemies the footstool of Thy feet. God will send the rod of Thy power out of Sion, and Thou shalt rule in the midst of Thine enemies." Also in the Apocalypse: "And I turned and looked to see the voice which spake with me. And I saw seven golden candlesticks, and in the midst of the candlesticks one like unto the Son of man, clothed with a long garment, and He was girt about the paps with a golden girdle. And His head and His hairs were white as wool or snow, and His eyes as a flame of fire, and His feet like to fine brass from a furnace of fire, and His voice like the sound of many waters. And He had in His right hand seven stars: and out of His mouth went a sharp two-edged sword; and His face shone as the sun in his might. And when I saw Him, I fell at His feet as dead. And He laid His right hand upon me, and said, Fear not; I am the first and the last, and He that liveth and was dead; and, lo, I am living for evermore and I have the keys of death and of hell." Likewise in the Gospel, the Lord after His resurrection says to His disciples: "All power is given unto me in heaven and in earth. Go therefore and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost, teaching them to observe all things whatsoever I have commanded you."”
Source
303
A.D.
c. A.D. 250–303
“"The court which is within the temple leave out." The space which is called the court is the empty altar within the walls: these being such as were not necessary, he commanded to be ejected from the Church. "It is given to be trodden down by the Gentiles." That is, to the men of this world, that it may be trodden under foot by the nations, or with the nations. Then he repeats about the destruction and slaughter of the last time, and says:- "They shall tread the holy city down for forty and two months; and I will give to my two witnesses, and they shall predict a thousand two hundred and threescore days clothed in sackcloth." That is, three years and six months: these make forty-two months. Therefore their preaching is three years and six months, and the kingdom of Antichrist as much again.”
Source

Post-Reformation

c. 1650 – 1900
1771
A.D.
John Gill Reformed
1697–1771
“And I turned to see the voice that spake with me,.... The Complutensian edition reads, "and there I turned": and so the Arabic version; that is, to see who it was that spoke, from whom the voice came, and by whom it was uttered; see Exo 20:18, and being turned, I saw seven golden candlesticks; which represented the seven churches, Rev 1:20; in allusion to the seven lamps in the candlestick of the sanctuary, Exo 25:37; compared to "candlesticks", for the use of them, which is to hold forth light; these have none of themselves, but what is put into them, and being put into them, they hold it forth; so the churches of Christ have no light of themselves, but what is put into them; and the light which is put into them, is not the mere light of nature, nor the law of Moses, but the Gospel of Christ; which dispels darkness, and is the means of enlightening sinners, and gives light to saints, by which they walk and work; and this light is put into the churches by Christ, whose the Gospel is, and who is himself come a light into the world; and being put here by him, it is held forth by them, especially by the ministers of it, who are the lights of the world, both by their ministry, and in their lives and conversations: and they are compared to "golden" candlesticks, because of their excellency, preciousness, and value, in the esteem of Christ; and for their brightness and purity in doctrine, discipline, and life; and for their splendour, glory, and beauty; and for their stability and duration; and though they are liable to corruption and taint, yet may be melted, refined, and purified as gold.”
Source
1832
A.D.
Adam Clarke Methodist
1762–1832
“And I turned For he had heard the voice behind him. To see the voice; i.e., the person from whom the voice came. Seven golden candlesticks - Ἑπτα λυχνιας χρυσας· Seven golden lamps. It is absurd to say, a golden silver, or brazen candlestick. These seven lamps represented the seven Churches, in which the light of God was continually shining, and the love of God continually burning. And they are here represented as golden, to show how precious they were in the sight of God. This is a reference to the temple at Jerusalem, where there was a candlestick or chandelier of seven branches; or rather six branches; three springing out on either side, and one in the center. See Exo 25:31-37. This reference to the temple seems to intimate that the temple of Jerusalem was a type of the whole Christian Church.”
Source
1849
A.D.
1774–1849
“I saw seven golden candlesticks, which, by the last verse of this chapter, represented the seven Churches of Asia. We may suppose these candlesticks to have been shewn to St. John, like what is described, Exodus xxv. 31. For in these visions of St. John are frequent allusions to the former tabernacle, and to things relating to the service and worship of God, which Moses was ordered to make. (Witham)”
Source
1871
A.D.
1871
“see the voice--that is, ascertain whence the voice came; to see who was it from whom the voice proceeded. that--Greek, "of what kind it was which." The voice is that of God the Father, as at Christ's baptism and transfiguration, so here in presenting Christ as our High Priest. spake--The oldest manuscripts, versions, and Fathers read, "was speaking." being--"having turned." seven . . . candlesticks--"lamp-stands" [KELLY]. The stand holding the lamp. In Exo 25:31-32, the seven are united in ONE candlestick or lamp-stand, that is, six arms and a central shaft; so Zac 4:2, Zac 4:11. Here the seven are separate candlesticks, typifying, as that one, the entire Church, but now no longer as the Jewish Church (represented by the one sevenfold candlestick) restricted to one outward unity and one place; the several churches are mutually independent as to external ceremonies and government (provided all things are done to edification, and schisms or needless separations are avoided), yet one in the unity of the Spirit and the Headship of Christ. The candlestick is not light, but the bearer of light, holding it forth to give light around. The light is the Lord's, not the Church's; from Him she receives it. She is to be a light-bearer to His glory. The candlestick stood in the holy place, the type of the Church on earth, as the holiest place was type of the Church in heaven. The holy place's only light was derived from the candlestick, daylight being excluded; so the Lord God is the Church's only light; hers is the light of grace, not nature. "Golden" symbolizes at once the greatest preciousness and sacredness; so that in the Zend Avesta, "golden" is synonymous with heavenly or divine [TRENCH].”
Source

Undated

date unknown
date
unknown
Glossa Ordinaria Medieval
“And I turned. And because I heard a voice, I turned, etc. Seven candlesticks. That is, seven churches burning and illuminated with the wisdom of the divine Word. Golden. As gold tried by fire and drawn out by blows is made into a candlestick, so the Church, purged by tribulations and drawn out into long-suffering by the strokes of temptations, is brought to perfection; and if it has a voice in the mouth and not in work, it is indeed a candlestick, but not golden.”
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.