Baucalis (or Boukolou, Baukalis) is a section in Alexandria, Egypt where St. Mark was reported to have been martyred, along with the historic location of his martyrium. It is also where Arius (Greek: Ἄρειος, AD 250 or 256–336) was a Christian presbyter and priest.

Baucalis (or Boukolou, Baukalis) is a section in Alexandria, Egypt where St. Mark was reported to have been martyred, along with the historic location of his martyrium. It is also where Arius (Greek: Ἄρειος, AD 250 or 256–336) was a Christian presbyter and priest.