MK 14:12 On the first day of the Feast of Unleavened Bread, when it was customary to sacrifice the Passover lamb, Jesus’ disciples asked him, “Where do you want us to go and make preparations for you to eat the Passover?” MK 14:13 So he sent two of his disciples, telling them, “Go into the city, and a man carrying a jar of water will meet you. Follow him. 14 Say to the owner of the house he enters, `The Teacher asks: Where is my guest room, where I may eat the Passover with my disciples?’ 15 He will show you a large upper room, furnished and ready. Make preparations for us there.” 

Since at least the fourth century CE a structure identified as the Cenacle, the site of the Last Supper, has been a popular Christian pilgrimage site on Mount Zion in Jerusalem

The Cenacle (from Latin cenaculum), also known as the “Upper Room”, is the site of The Last Supper. The word is a derivative of the Latin word cena, which means dinner. In Christian tradition, based on Acts 1:13, the “Upper Room” was not only the site of the Last Supper (i.e. the Cenacle), but the usual place where the Apostles stayed in Jerusalem.
Thus the Cenacle is considered the site where many other events described in the New Testament took place, such as:

  • ·         the Washing of the Feet
  • ·         some resurrection appearances of Jesus
  • ·         the gathering of the disciples after the Ascension of Jesus
  • ·         the election of Saint Matthias as apostle
  • ·         the descent of the Holy Spirit upon the disciples on the day of Pentecost