In 1985, a handful of Coptic families in North Texas established St. Mary Coptic Orthodox Church in Colleyville, Texas. By the late 90's, St. Mary's had reached capacity, and it was determined that the time was right to build another Coptic Orthodox church in North Texas. This church would be named after St. Philopateer Mercurius, a 3rd century soldier who was martyred for his faith. The city of Richardson was chosen as the site for this new church in order to accommodate the growing population of Copts in the suburbs of Dallas.