The most artistically important district of San Polo is centered around the Frari, the Franciscans' church. Like most of the churches in Venice, the exterior is surprisingly dull, just a very large, nondescript brick building. Given the plodding exterior, the lightness of the interior is quite surprising. The church isn't wildly decorative inside either, but it's elegant, and the highlight is a series of masterpieces by Venice's most famous painter, Titian.