The East-West Schism, or the Photian Schism (so named because it was provoked by Photius, the Archbishop of Constantinople).

There are several different online websites where one can find a list of different flags for different countries. Some of these include: Wikipedia, Photius, and Flagpedia.

Saint Anthony Kauleas has no recorded patronages, here is an excerpt from his biography:

Born to a noble family from Phrygia who had moved to the country to escape persecution by the iconoclasts. Monk near Constantinople at age 12. Abbot of his house. Patriarch of Constantinople in 893. He worked to heal the schisms created by his predecessor Photius, presiding over the Fourth Æcumenical Council of Constantinople in 869 and 870 which condemned or reversed all that Photius had done; all records of the council were destroyed by later schismatics. Throughout his life Antony was known for his personal holiness, his deep personal prayer life, and the sanctity he brought to his offices.

Enthroned Virgin and Child is a mosaic in Hagia Sophia. It was inaugurated by Patriarch Photius I in 867. The mosaic shows Mary sitting on a throne without a back and is shown holding the Child Jesus on her lap and her feet on a pedestal.