When Archbishop Maximianus (431–434) died on Great and Holy Thursday, Proclus was immediately enthroned by the permission of the Emperor Theodosius II and the bishops gathered at Constantinople.
Ketika Uskup Agung Maximianos (431–434) meninggal pada hari Kamis Putih, Proklos segera dinobatkan dengan izin dari Kaisar Theodosius II dan para uskup berkumpul di Konstantinopel.