Originally built in 1927 to house the Elementary Laboratory School, on the campus of Kansas State Teachers College (now PSU) where students could get practical experience by interning and teaching classes grades 1 - 6. It was designed by Charles A. Smith of Kansas City and is an example of Colonial Spanish architecture trimmed with Carthage limestone. The building was built and paid for by the City of Pittsburg and claimed to be the first building in the city that was fireproofed. Named in honor of Horace Mann, an American pioneer educator, it closed in 1972 and was used mainly for storage until renovated in 2000. It now houses the Student Welcome Center on the campus of Pittsburg State University.