Rough Itinerary 10 weeks to 3 months approx

[bpiercej]

MY best friend and i are leaving at the end of May and are traveling Europe for 10 weeks to 3 months this is a rough itinerary of the cities we plan on seeing. We are kind of focused on Museums and Architecture but want to see some night life and anything else that may be interesting. This is our first trip and we want to do a whirlwind of europe to discover what countries we will eventually go back to visit more in depth. If you have any suggestions changes to our itinerary or just a better way going about a trip like this please by all means tell me I am eager to hear suggestions from all you traveling veterans.
Well here it is

Fly into Dublin Probably out of New York
2 days Dublin
3 days London
3 days Paris
Lisbon or Porto
Somewhere in Spain
2 Days Ibiza
Barcelona
Somewhere in Switzerland
3 Days in Rome
2 Days in Venice
3 Days in Athens
3 Days in Istanbul
2 Days in Budapest
2 Days in Vienna
2 Days in Munich
2 Days in Prague
3 Days in Berlin
2 Days in Krakow
1 Day Auschwitz
3 Days Moscow
3 Days St. Petersburg
2 Days in Helsinki
2 Days in Stockholm
2 Days in Copenhagen
3 Days in Amsterdam
2 Days in Brussels
Then fly back home and get back to Michigan

Thanks again