High Quality Content by WIKIPEDIA articles! The Boesch, Hummel, and Maltzahn Block, also referred to as the Boesch-Hummel-Maltzahn Block, is a historic building in New Ulm, Minnesota. The private, commercial structure was placed on the National Register of Historic Places (NRHP) on December 31, 1979. The building is significant for the extensive features of the front facade as compared to the other "Main Street" buildings in New Ulm and surrounding communities.