Built between 1823 and 1829, this vast Gothic Revival church is renowned for its polychrome interior and rich ornamentation. Its treasures include its Casavant organ (1891), one of the largest in North America, and its remarkably carved high altar and pulpit. Don't miss the Sacred Heart Chapel, with its linden woodwork and bronze reredos. Many concerts and organ recitals are held at the Basilica, and every summer for the past twenty years it has hosted a Mozart festival jointly with the Montreal Symphony Orchestra. Multimedia show: "And Then There Was Light".