Kosovo is a secular state with no state religion. The freedom of belief, conscience and religion is explicitly guaranteed in the Constitution of Kosovo. Islam and Christianity are the most widely practiced religions among the people of Pristina. The remaining 1.9% of the population reported having no religion, or another religion, or did not provide an adequate answer. Pristina has centres of worship for a multitude of faiths for its population. The Cathedral of Pristina is perhaps the largest cathedral in Kosovo and is named in honour of the Albanian Roman Catholic nun and missionary, Mother Teresa. Some of the mosques of Pristina, among others the Imperial Mosque and Çarshi Mosque, are centuries old and were built during the Middle Ages by the Ottomans.