The Piazza Del Duomo of Pisa known as "Piazza dei Miracoli" (Cathedral Square), is the area that…read morecontains various historical, preserved landmarks, including the 'Leaning Tower of Pisa". This area was declared a UNESCO Patrimony of the Humanity for the whole area.
The outdoor square is accessible to the public, and you can take outside pictures for free (e.g. if you just want to take a picture with you "holding up" the Tower, that can be done with no ticket). If you want to head inside many of the buildings, you can buy tickets at the official site (https://www.opapisa.it/en). Because there was no special exhibit happening during January 2024 (which is definitely the low season for this part of the world), there were six permanent buildings that you can enter:
1. Tower 2. Baptistery 3. Camposanto 4. Cathedral 5. Opera Del Duomo Museum 6. Sinopie Museum.
For 2024, prices are 27€ each for the entire experience. Separately, it is 20€ for just the tower, 10€ for everything else. Or a la carte, 7€ each (except the Cathedral which is free, but still requires a complementary ticket acquired at the ticket office the day of). We got the entire experience, and that definitely is the way to go if you intend to stay for a 1/2 day visit.
The Tower opens at 9, and the others soon after. It was very sparse at that time, but definitely got busier by lunchtime. But even then, there were hardly any lines anywhere. And because it was a Sunday, Roman Catholic masses were occurring throughout the morning and early afternoon, which you can attend.
Definitely would recommend spending 1/2 of a day here, and soaking up the history.