papagena: Other than common sense courtesy, no special dress code is in place. I was asked to wear a "throw-away" yarmulke which was provided.

Just got back from Venice. No reservation required to see Guggenheim
Three day pass for Vaprettos is going for 22E, highly recommended if you are planning to go to Murano, Burano or catching the bus to the airport from trani station or having an evening ride down the Grand Canal. One ride costs 5E
Have fun
Tiva

Thanks joegri. I thought there might be something about head coverings, but I couldn't remember the details.