Something I picked up in church: The “upper room” that was the setting for the Last Supper (Luke 22:7-12) was also very likely the same “upper room” in which the Disciples met to replace Judas (Acts 1:13). That means it was also the place where Jesus washed His Disciple’s feet and since it was the place “where they were staying” in Jerusalem, it must have been where Jesus appeared to them after His resurrection and was very likely where the Holy Spirit descended at Pentecost (Acts 2:1), which we celebrate this Sunday. So this room was, in effect, the first church-as-building. And it reminds us of what happens even today in church buildings, which are the places where we too receive the Lord’s Supper, serve each other, meet the Risen Lord, and receive the Holy Spirit.