1. Siena Cathedral, also known as the Duomo di Siena, is a stunning example of Italian Romanesque-Gothic architecture located in the city of Siena, Tuscany, Italy. Construction of the cathedral began in 1215 and took over a century to complete. The exterior of the cathedral is made of alternating greenish-black and white marble, giving it a distinctive appearance.

One of the most notable features of the cathedral is its intricate façade, which is adorned with sculptures and decorative elements. The interior of the cathedral is equally impressive, with beautiful frescoes, mosaics, and stained glass windows. The highlight of the interior is the Piccolomini Library, which houses a collection of illuminated manuscripts and beautiful frescoes by the artist Pinturicchio.

Another noteworthy feature of Siena Cathedral is its impressive striped bell tower, known as the Mangia Tower. Standing at over 77 meters tall, it offers panoramic views of the city from the top.

2. The Siena Cathedral is open to visitors daily, with varying hours depending on the time of year. Generally, it is open from 10:30am to 5:30pm. It is recommended to check the official website or contact the cathedral for the most up-to-date information on opening hours. The contact phone number for the cathedral is +39 0577 283048.

3. There is an admission fee to enter the Siena Cathedral, which includes access to the Piccolomini Library and other areas of the cathedral. The ticket price may vary depending on whether you choose a guided tour or a self-guided visit. It is advisable to check the official website for current ticket prices and purchase options.

Siena Cathedral is located in the historic center of Siena, making it easily accessible by foot. The nearest bus stop is Piazza Gramsci, which is a short walk from the cathedral. If traveling by car, there are parking facilities available outside the city walls, and it is recommended to use public transportation within the city to reach the cathedral.