This document lists several cities around the world that are centered around houses of worship, including Mecca in Saudi Arabia, which is centered around the Kaaba at Masjid al-Haram, Istanbul in Turkey where the Hagia Sophia is located, Tirupathi in Andhra Pradesh centered on the Tirumala Venkateswara Temple, Rome in Italy known for St. Peter's Basilica at the Vatican, and Jerusalem an important city for Christianity, Islam, and Judaism. The document provides examples of cities built around religious sites and structures.