RRTL Architects has extensive experience in the planning and design for the restoration and renovation of historic buildings and places. The firm has worked on the renovation of numerous historic buildings in the region including the Minnesota State Capitol and several other Cass Gilbert buildings in St. Paul, Minnesota. RRTL has experience working with the regulations and staff of several historic agencies including the State Historical Preservation Office in Minnesota. The firm recently completed the restoration of San Fernando Cathedral in San Antonio, Texas which was built in 1739. This is one of the most historic structures in the southwestern region of the country. The project received an AIA Minnesota Honor Award.