The image is of Heilig-Hartcollege (Sacred Heart College) in Maasmechelen, Belgium.
The sender didn't write anything (not one word) on the back of the postcard...and although the back of the postcard includes printed information about what is pictured on the front (above), I'm not able to translate.... :(
Come to think of it, I hope the words printed on the front of the postcard are appropriate for posting...since I'm not able to translate....