While the tallest building in Montana is the First Interstate Center in Billings (272 feet), did you know that Montana is also home to the tallest load-bearing brick building in the world? Get our free mobile appAccording to the folks on the internet, they say that the tallest load-bearing brick building is located in Chicago. Before we reveal which Montana brick building is the tallest in the world, let's check out some weird and wild facts about Montana. Gallery Credit: Derek WolfWhich Montana building is the world's tallest load-bearing brick building? It was declared "the tallest load-bearing brick building in the world" by the Brick Institue of America.