Churches are traditionally buildings where Christians assemble to worship. Earlier, the Jewish Christians had used synagogues for this purpose, but later, with the governments recognizing minorities and their rights, a room, then, whole buildings were designed specifically. Churches often have a cross, the symbol of their religion, a long central rectangle, with side rectangles, and a rectangle in front for the altar space or sanctuary, within them and are most often shaped in the form of a dome. Another name for churches is a cathedral, which is much bigger than a church, and is known as housing the seat of a bishop. Their architecture depends upon their size and grandeur, from the Notre Dame Cathedral to Esztergom Basilica in Hungary and Duomo, Milan Cathedral, Italy.