Commemoration of the dedication of the Church of the Resurrection, the Holy Sepulchre, in Jerusalem.
After St. Helen found the True Cross, the emperor Constantine the Great built a great church over the tomb of Christ and the hill of Golgotha in Jerusalem. Its dedication was celebrated in the year 335 with a gathering of bishops from across the empire, and the Exaltation of the Cross was appointed for the following day.
The Church keeps the memory of this dedication each year on September 13, on the eve of the Exaltation.
Feast day
On the New Calendar, Founding of the Church of the Resurrection is commemorated on September 13. Churches on the Old (Julian) Calendar keep the feast on September 26 of the civil calendar.
Also commemorated on September 13

Aristides the Philosopher
Martyr, Αριστείδης
Holy Martyr Aristides the Philosopher of Athens, apologist of the faith.
Name days: Aristidis, Aristeidis, Aristides, Aris, Aristea
Chronides, Leontios and Serapion
Martyr, Κρονίδης, Λεόντιος και Σεραπίων
Holy Martyrs Chronides, Leontios and Serapion of Alexandria.
Meletios Pigas of Alexandria
Hierarch, Μελέτιος Πηγάς
St. Meletios Pigas, Patriarch of Alexandria, theologian and defender of Orthodoxy.
Hierotheos the Younger of Iveron
Venerable, Ιερόθεος ο Ιβηρίτης
Venerable Hierotheos the Younger of Kalamata, monk of Iveron on Mount Athos.
Chrysostomos of Smyrna and the Hierarchs with him
Hierarch, Χρυσόστομος Σμύρνης
Hieromartyr Chrysostomos of Smyrna and the bishops martyred with him in the Asia Minor catastrophe of 1922.