1. Orvieto Cathedral, also known as the Duomo di Orvieto, is a stunning example of Italian Gothic architecture located in the town of Orvieto, in the Umbria region of Italy. Construction of the cathedral began in 1290 and it was completed in 1591.

The facade of the cathedral is adorned with intricate mosaics, sculptures, and bas-reliefs, depicting biblical scenes and figures. The interior of the cathedral is equally impressive, featuring colorful frescoes, beautiful stained glass windows, and a stunning Chapel of the Corporal which houses a reliquary with a Eucharistic miracle.

One of the most famous features of the cathedral is the Chapel of San Brizio, which is adorned with breathtaking frescoes by Luca Signorelli depicting scenes from the Apocalypse and the Last Judgment. These frescoes are considered some of the finest examples of Renaissance art in Italy.

2. The working hours of Orvieto Cathedral can vary depending on the season, so it is recommended to check the official website or contact them directly for the most up-to-date information. The phone number for the Cathedral is +39 0763 341 580.

3. Tickets to visit the Cathedral can be purchased on-site or online. The price of tickets may vary depending on whether you wish to visit just the Cathedral or also include other areas such as the underground tunnels or the museum. As for transportation, Orvieto is easily accessible by train from major cities such as Rome and Florence, and the Cathedral is located in the heart of the town, within walking distance from the train station.