STS Constantine & Helen Greek Orthodox Cathedral 3352 Mayfield Rd, Cleveland, OH44118 This Greek Orthodox Church opened its doors on September 29, 1957. The first service was celebrated on Christmas…More Eve with 12 worshipers and 4 board members. Today, St Constantine is lead by Rev. Dr. Steven J Callos and Rev. Peter Metallinos and 12 council members. All families are welcome and can request membership in person or online. Worship services are held on Saturdays and various days throughout the week for special occasion. All dates and times are listed on their Web site. This parish recently started an education program from pre-k until 2nd grade. The first class consisted of 25 students in attendance. This is conveniently located on Mayfield Road in a residential neighborhood with on street parking or in the lot.