A Holy City is the city where a Great Prophet was when he founded a religion. This city then becomes "holy" for that religion, and gets some bonus pressure, besides being the very first city from which the religion starts to spread. Most of the time, the Holy City for a particular religion is the Image:Capital5.png Capital of the nation which founded it. There are certain wonders that may only be constructed in a Holy City, such as the Grand Temple and the Borobudur.