La Cittadella

This museum hosts artifacts from the history of computers, including Italy's oldest computer built in the end of the 1950s, and a collection of mechanical calculators from the early 1900s.

A very small Gothic church built in 1230 to house a thorn from Jesus's crown, it's considered one of the best expressions of Italian Gothic. It is so small that in 1800, it was moved from the Arno riverbank to a place some metres higher, one stone at time, to protect it from flooding. It's usually not open to the public.

Keith Haring mural. Keith Haring visited Pisa and fell in love with the town, so he decided to paint this amazing mural as a gift to Pisa. Though extremely large, it is easy to miss so look out for it; it is located between via Giuseppe Mazzini and via Massimo D'Azeglio just off Piazza Vittorio Emanuele II.

The first university botanical garden in Europe, created by the will of Cosimo de' Medici in 1544.

Skipped over by many visitors, this museum is a treat for art lovers. After World War II many of the surviving murals and pieces of murals from Pisa's Campo Santo were detached from the walls to try to preserve them. It was unexpectedly discovered that the artist sketches underneath survived. These were moved to this museum.

A 14th-century building that has replaced the Torre della Fame (tower of hunger), where the Conte Ugolino della Gherardesca was imprisoned and left to die of hunger with his sons, as cited in the Dante's Divina Commedia.