According to the Liber Pontificalis, it was Alexander I who inserted the narration of the Last Supper (the Qui pridie) into the liturgy of the Mass.

[1] It is viewed as a product of the agenda of Liber Pontificalis—this section of the book was probably written in the late 5th century—to show an ancient pattern of the earliest bishops of Rome ruling the church by papal decree.

[5] It is certainly possible, however, that Alexander played an important part in the early development of the Church of Rome's emerging liturgical and administrative traditions.

A later tradition holds that in the reign of the emperor Hadrian, Alexander I converted the Roman governor Hermes by miraculous means, together with his entire household of 1,500 people.

The Roman Martyrology lists them as Eventius, Alexander and Theodulus, the order in which their names are given in historical documents.