1. The Kairaouine Mosque, also known as the Mosque of al-Qarawiyyin, is located in the city of Fez, Morocco. It is considered one of the oldest existing and continuously operating universities in the world. Founded in 859 by Fatima al-Fihri, it has been an important center of education and Islamic scholarship for over a thousand years.

The mosque itself is an architectural masterpiece, combining traditional Moroccan style with intricate geometric designs and calligraphy. Its main prayer hall can accommodate up to 20,000 worshipers and features a beautifully decorated mihrab (prayer niche). The courtyard of the mosque is equally impressive, with intricate tile work and a central marble fountain.

One interesting fact about the Kairaouine Mosque is that it was initially built as a small mosque, but gradually expanded over the centuries to become the sprawling complex it is today. It also boasts a rich library containing thousands of ancient manuscripts, some of which date back to the 9th century.

2. The Kairaouine Mosque is open to visitors, but non-Muslims are not allowed to enter the prayer area. However, they can explore the courtyard and visit the library. The mosque is open daily, but it is closed to non-Muslims during prayer times.

It is recommended to check the local prayer schedule to plan your visit accordingly. As for contact information, the mosque does not have an official phone number available to the public.

3. There is no specific ticket information available for visiting the Kairaouine Mosque. However, donations are appreciated to support the maintenance of the mosque and its educational activities.

In terms of transportation, Fez has a well-connected public transportation system. Visitors can take a taxi or use public buses to reach the mosque. It is also easily accessible by walking from various points in the city center, as it is located in the heart of the old medina of Fez.