Blees Military Academy, also known as Still-HiIdreth Osteopathic Sanatorium, is a historic military academy located in Macon, Missouri. The academy operated between 1899 and 1915. The old Academic Hall and Gymnasium of Blees Academy were listed on the National Register of Historic Places in 1979. Blees spared no expense with this Academy. Academic Hall and the Gymnasium were both constructed in a variant of the Romanesque Revival style. Decorative features of these buildings include crenellated gables and parapets, distinctive corbel tables and bartizans supported by corbeled culs-de-lampe.