Aquinas: The Office For The Solemnity Of Corpus Christi Russian Icon of the Last Supper Source and License This contains the Scripture readings St Thomas chose for the Office, along with the hymns and antiphons and prayers he wrote for the Solemnity. Lessons I-VI contain exceprts from a sermon he preached on the feast. This text does not contain the Psalms used. The entire Office with Psalms can be viewed online HERE . Be sure the date box reads “6-11-2009”