Most say it's Jerusalem in Christianity, and some say it's the Holiest city for Islam and Judaism as well.
Jerusalem would probably rank as the holiest city to Christians (as well as Jes and Moslems). It was in, or near, Jesrusalem where Christ was born and died.
One of the holiest of cities for Christians is the city of Jerusalem. Bethlehem is another holy city for Christians.
heaven
mecca
Jerusualam
The holiest city for the Muslims is Makka (Mecca) situated in Saudi Arabia.
Unlike Judaism (Jerusalem) or Islam (Mecca), there is no "holiest place of worship for Christians."
Varanasi, also known as Banaras or Kashi, is considered one of the holiest cities for Hindus. It is a major pilgrimage site and is believed to be the dwelling place of Lord Shiva. Many Hindus visit Varanasi to perform rituals and seek spiritual blessings.
madina
vatican city
Jerusalem.
The holiest city for the Muslims is Makkah(Mecca),S.Arabia