Part of Musei Civici d'Arte Antica.
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Coronata
60-m tower, the second largest in the city. Presumably it used to be higher than its current height. It's a B&B and room for events, also hosts shows and presentations.
Roman Excavations of the "Stock Exchange" Library
A compact basement-level field of ruins from Bologna's past, from 2nd-century BCE Roman roads and buildings, to a 16th-century CE cistern. Metal walkways take you on a 100-m course over and around the ruins. But this thoughtful display is all the more interesting for its location: under a 19th-century stock exchange hall ("salaborsa"), which has been converted to a 21st-century library. Enjoy this airy, pleasant room on your way down to the ruins. A colourful flyer gives context in English and Italian. An easy excursion right on Piazza Maggiore.
Altabella
47 m, built in the 13th century. It's built into the Palazzo del Podestà.
City Art Collections
A painting collection of works from various historical periods. Features include works by Giuseppe Maria Crespi (Ritratto del cardinale Lambertini- Portrait of Cardinal Lambertini), Ludovico Carracci (S. Caterina in Carcere – St. Catherine in Prison), and Guido Cagnacci (Cleopatra e Lucrezia), Francesco Hayez (Ruth).