NRHP Nomination Form"Leo M. J. Dielmann, of San Antonio designed the second St. Mary's Church and St. Mary's School. The Classical Revival St. Mary's school (1924) stands opposite St. Joseph's Halle, which was also designed by Dielmann."
The front of the building has four large columns wich support the gable of the building. The words "Science * Religion * Patriotism" is engraved across the beam at the top of the columns. Inside the gable is a decorative design.
The building has a band of white protruding below the roofline. Below is another band of white with dots decorating the bricks before another white band.