The first Christian church's specific location is unknown, but it is thought to have been in or near the upper chamber where the disciples assembled for the Last Supper. Nowadays, several sites in Jerusalem are considered essential to the early Christian church, including the Church of the Holy Sepulchre, which is thought to be the site of Jesus' crucifixion and burial, and the Cenacle, which is thought to be the place of the Last Supper and the Holy Spirit's descent on Pentecost.