St. Paul, Minneapolis, & Manitoba Railway Company Shops Historic District is a group of 1882 limestone

Limestone

Limestone is a sedimentary rock composed largely of the minerals calcite and aragonite, which are different crystal forms of calcium carbonate . Many limestones are composed from skeletal fragments of marine organisms such as coral or foraminifera....

 maintenance buildings in Saint Paul

Saint Paul, Minnesota

Saint Paul is the capital and second-most populous city of the U.S. state of Minnesota. The city lies mostly on the east bank of the Mississippi River in the area surrounding its point of confluence with the Minnesota River, and adjoins Minneapolis, the state's largest city...

, Minnesota

Minnesota

Minnesota is a U.S. state located in the Midwestern United States. The twelfth largest state of the U.S., it is the twenty-first most populous, with 5.3 million residents. Minnesota was carved out of the eastern half of the Minnesota Territory and admitted to the Union as the thirty-second state...

. They served the Saint Paul, Minneapolis and Manitoba Railway, which later became part of the Great Northern Railway.

The buildings, located just west of the Minnesota Transportation Museum

Minnesota Transportation Museum

The Minnesota Transportation Museum is a transport museum in Saint Paul, Minnesota.The MTM operates several heritage transportation sites in Minnesota and one in Wisconsin...

roundhouse, have been redeveloped by the Saint Paul Port Authority and are now known as the Empire Builder Business Center.