One of Lucca's many architecturally significant churches, this glittering Romanesque edifice marks the spot where the city's Roman forum was. The present building with exquisite wedding-cake facade was constructed on the site of its 8th-century precursor over 300 years, beginning in the 11th century. Crowning the structure is a figure of the archangel Michael slaying a dragon. Inside the dimly lit interior, don't miss Filippino Lippi's 1479 painting of Sts Helen, Jerome, Sebastian and Roch (complete with plague sore) in the south transept.