The Cathedral of San Donato is a prominent church located in Arezzo, Italy. It is dedicated to Saint Donatus, the patron saint of the city. The cathedral features a mix of architectural styles, primarily Romanesque and Gothic, and is known for its stunning stained glass windows and intricate frescoes. Construction of the cathedral began in the 13th century and was completed in the 16th century. The interior houses several important artworks, including a famous crucifix by Donatello. The cathedral stands as a significant historical and cultural landmark in Tuscany.