Vatican City is in fact a country that is located within the confines of Rome Italy. There are several buildings there and St. Peter's is a centerpiece. There is no charge to enter and it is a wonderful place to see. Suggest going as early in the morning that you can to get in line and beat the crowds. There is a line to go inside the Basilica itself and a separate line to climb to the dome. If you wish to see the museums of the Vatican, that is a separate building and entrance. There are many great tour options to help you optimize your time and what you get to see but you can do on your own as well.

The Vatican is the area which is an independent state within Rome and St Peter’s is within the Vatican

certo. Non si può entrare con pantaloncini e canotte ...

To enter the basilica you have to Que up to the right of the main building. The security check is just prior to gaining entrance at the front

Once in the basilica you go to queue for the lift (or walk the stairs!). Once you get out of the lift there are signs for tge cupola, it's one way up and one way down I.e you do up one side, come out onto the viewing area then go back down the other side. I recommend getting this part done before it gets busy then you can explore the basilica, which is massive and amazing.

Mi dispiace penso di si ma non ne sono sicura

Molto presto al mattino appena aprono è il momento migliore

Yes there is

Πρωι αν ειναι δυνατον. Μετα η αναμονη βαραει κοκκινο.