From Rome what would be the best route to visit pisa tower pompii and last Venice .
Venice is last as we have ticket from Venice to Athens from Marco Polo airport
Rome to pompii to pisa and Venice or
Rome to pisa to pompii and Venice
What kind of train do I need .
Trains with changes Rome Termini to Naples to Pisa to Venice www.trenitalia.com/tcom-en Enter time 08.00 for current train schedule
Trains Naples lower basement station to Sorrento and pompeii www.eavsrl.it/web/content/orario-ferrovia
There is luggage storage at Pompeii and Pisa central
Pisa Tower tickets www.opapisa.it/en/tickets/
www.rome.info www.pompeiisite.org www.timeout.com/naples www.aboutpisa.info www.venice-tourism.com
You need to look at a map of Italy, and it will become obvious.
Visit Pompeii as a long day trip from Rome and save yourself a hotel change. Then head up to Pisa and onto Venice.
By car or trains? Pompeii is to the south. So to get to Pisa/Venice you will have to go back to/thru Rome. I would think Pompeii should be done first logistically.
Look at a map.
That is quite a selection of wants. Of course, Pompeii, then Pisa, then Venice. I hope you have enough time for these trips.