What is the fine-grained topic of the following text: Explore the city’s unique heritage with must sees such as Piazza del Duomo, where you can admire the Cathedral Santa Maria del Fiore, Giotto's Bell Tower and the Baptistery, Piazza della Signoria with its magnificent statues, or why not explore the Uffizi Gallery with its masterpieces by Botticelli, Michelangelo and Leonardo Da Vinci. Only return the topic.
Touring notable historical sites and art in the city.