From the metro station Vactican church is 5 minuntes walk. Try to make it as early as possible to the Vactican church. You will save almost 1 to 2 hrs of wait time just by reaching early. The streched open arms of the vactican church gives you a warm welcomes. The photo session of the vactican church can be covered in the later part of the day. The church opens at 7 o clock and closes at 12:30 in noon. This is the biggest cathedral in world and unique piece of achitecture and connoisseur. There are several chapels in the church where preist from various parts of the world are performing rituals. You can easily spend 2 hours enjoying each chapel and the sculptures and paintings used to decorate it. Each piece of art narates story from bible or the renisance period. One of the Michelangelo's famous piece of art - Pietà resides in the St Peters Basallica. The marble statue was made for the cardinal's funeral monument. The audio guide counter starts at 9 o clk therefore we had to skip it. You can hire local guide if you want to. Each and every dome is decorated with Mosaic paintings. http://en.wikipedia.org/wiki/Mosaic. For beginer, the domes looks like one painted with colors. Once you have covered all the chapels inside the church you can come out and turn to your left to head to the Top of the Dome. There is ticket of 7 Euros for Elevator service or Ticket of 5 Euros to climb the Dome using the steps. The Evelvator takes you half way through. Once you get out of the Elevator you can enter the Dome and get close view of the Mosaic art painted on the inner wall of the Dome. Its worth spending those 7 Euros. One has to climb another 250 circular and small steps which swirl around the Dome to reach the top . There are cafeteria, restroom and dirnking water facilities before you start climbing the steps. If its not a clear day then I would recomend, its not worth climbing those steps for elderly person. You can head straight to the exit and take an elevator to the ground floor. If its clear day then you get scenic view of the Roman city. This is place for KodaK Moment :). Once you have done with it take an elevator to the ground floor. You can get change to see the Pope on Wednesday in front of the church. I think you have to register your name to get place in the auditorium in front of the church. You need to do more research about the same.