- Founded in Athens in 1973, Reiser, Valentour, and Callahan, Architects has grown to become one of Southeastern Ohio's largest general practice architecture firms, attracting staff from around the country. Together we enjoy the natural beauty of Athens County. We've been here for over twenty years, and we're here to stay. The people of RVC Architects are versatile, resulting in a small firm with ...www.rvcarchitects.com