Charles Trimble and his wife, Rosa, listed the home as a Green Book site in 1939.
A North Omaha castle that once provided safe accommodations for Black people during the Jim Crow era is now listed on the National Register of Historic Places.
The three-story concrete-block house, now locally referred to as Trimble Castle, was officially added to the National Register of Historic Places in December 2025. The designation recognizes both Trimble Castle’s architectural features and its historical role as a safe haven for Black folks…