10:00 am - 5:30 pm 2025 Ohio Preservation Council Symposium August 1 @ 10:00 am - 5:30 pm 2025 Ohio Preservation Council Symposium We’re excited to announce that registration is now open for the 2025 OPC Symposium, taking place on Friday, August 1st at the Columbus Metropolitan Library. Join us for a full day of engaging presentations, demonstrations,... $20 – $60