I assume you'll be at one of the hotels at Rockside and I-77. If so, the closest church would be the Cathedral of St. John the Baptist. Take Rockside west from the hotel. Rockside turns into Snow Road, and the Cathedral is at the corner of Snow and Broadview in Parma--probably about a mile from the hotel. If that doesn't work for you, continue westbound on Snow, turn right (i.e. north) on State Road. The Ukrainian Catholic Cathedral of St. Josaphat will be on the left, and, if you continue North on State Road into Cleveland, St. Mary's Church (Ruthenian) will be on the left, North of I-480 (just inside Cleveland). If neither of these possibilities appeals to you, then, instead of turning North on State from Snow Road, you can continue westbound on Snow until you reach West 54th Street. Turn right (North) onto West 54th, and Holy Spirit Church (Ruthenian) will be on the left.