Stairs were a regular architectural feature of multistory buildings in 32 AD.
Jesus instructed the disciples to go to the upper room to prepare for the coming of the Holy Spirit, as He had promised them. This gathering was a time for prayer, reflection, and unity among the disciples after His resurrection and before His ascension. It was in this setting that they would later receive the Holy Spirit during Pentecost, empowering them for their mission to spread the Gospel.
It took place in the Upper Room of a house in Jerusalem; the disciples were told to go into the city and find a man carrying water, follow this man, and ask him when he arrived at his house where the guest room was. This is the room where Jesus would share the Passover meal with his disciples. (the scripture is Luke 22:10-12)
At the Last Supper, in the Upper Room. It was the last meal Jesus shared with His disciples before He was crucified.
The Upper Room was the place where Jesus shared the last meal before is crucifixion with His disciples. It was at this meal that Jesus instituted the sacrament of Holy Communion which holds an important place in the life of a Christian.
The Jewish Passover meal was celebrated in the upper room.
They replaced Judas, the traitor with a vote and then waited in an upper room for the Holy Spirit to come as Jesus promised. There is no record of any fear in them as when Jesus was crucified, (John 20.19)
In biblical context, the upper room was used by Jesus and his disciples for the Last Supper and the Holy Spirit descended upon them. It was chosen for its privacy and symbolic significance as a place where significant events could take place.
Jesus celebrated the passover meal with the apostles and some of his disciples in the upper room.
Jesus and the disciples returned to Jerusalem one last time together. There they may have met in the upper room where they had shared Passover and where Jesus had instituted the Lord's Supper. He told the disciples to wait until they had been clothed with power from on high, until the Holy Ghost came upon them--the gift Jesus promised just prior to His death.
Jesus appeared to the disciples in the room, he also met two disciples on the road to Ema mus.
forty days
[John 20:24] Thomas called Didymus aka Doubting Thomas because when the disciples told him they had seen Jesus, Thomas would not believe them unless he had tangible proof which he got 8 days later when Jesus reappeared.