According to later tradition, the Last Supper took place in what is called today The Room of the Last Supper on Mount Zion, just outside of the walls of the Old City of Jerusalem, and is traditionally known as The Upper Room. This is based on the account in the Synoptic Gospels that states that Jesus had instructed a pair of unnamed disciples to go to the city to meet a man carrying a jar of water, who would lead them to a house, where they were to ask for the room where the teacher has a guest room. This room is specified as being the upper room, and they prepare the Passover there. It is not actually specified where the city refers to, and it may refer to one of the suburbs of Jerusalem, such as Bethany; the traditional location is not based on anything more specific in the Bible, and may easily be wrong. The traditional location is an area that, according to archaeology, had a large Essene community, adding to the points which make several scholars suspect a link between Jesus and the group (Kilgallen 265).
Saint Mark's Syrian Orthodox Church in Jerusalem is another possible site for the room in which the Last Supper was held, and contains a Christian stone inscription testifying to early reverence for that spot. Certainly the room they have is older than that of the current coenaculum (crusader - twelfth century) and as the room is now underground the relative altitude is correct (the streets of first century Jerusalem were at least twelve feet (3.6 metres) lower than those of today, so any true building of that time would have even its upper storey currently under the earth). They also have a revered Icon of the Virgin Mary, reputedly painted from life by St Luke.