Basilica di San Clemente in Santa Maria dei Servi
What the experts agree on
This austere 13th-century basilica impresses with its unfinished brick facade and towering campanile, but the real draw is Pietro Lorenzetti's frescoes in the north transept chapel—a masterpiece worth seeking out despite the church's stark,
“The 13th-century Basilica di Santa Maria dei Servi has frescoes by Pietro Lorenzetti in a chapel off the north transept.”
– Lonely Planet
"Beyond some cypress and a small patch of green grass, this huge 13th-century church sits facadeless, with mute rough brick climbing up the front next to an enormous campanile." Full review