The ancient baptismal creed of the Latin Church — its roots in the profession of faith made at baptism, its 'received text' settled by the eighth century; the pious legend that the twelve Apostles each contributed an article is medieval, not history.
I believe in God, the Father almighty, Creator of heaven and earth; and in Jesus Christ, his only Son, our Lord; who was conceived by the Holy Spirit, born of the Virgin Mary, suffered under Pontius Pilate, was crucified, died, and was buried. He descended into hell; on the third day he rose again from the dead; he ascended into heaven, and is seated at the right hand of God the Father almighty; from thence he shall come to judge the living and the dead. I believe in the Holy Spirit, the holy Catholic Church, the communion of saints, the forgiveness of sins, the resurrection of the body, and life everlasting. Amen.
The dated sources the library holds, oldest first — in their own words.
About the year 400, Rufinus of Aquileia gives a detailed account of the Creed's composition, which he professes to have received from earlier ages — an early witness to the old Roman baptismal creed that stands behind our text.
“Throughout the Middle Ages it was generally believed that the Apostles, on the day of Pentecost, while still under the direct inspiration of the Holy Ghost, composed our present Creed between them, each of the Apostles contributing one of the twelve articles. This legend dates back to the sixth century.”
The fuller "received text" (Textus Receptus) of the Apostles' Creed — the form used ever since — takes shape in Gaul and southern Germany, and by the age of Charlemagne is established throughout the Latin West.