This may seem like a stupid question BUT, I read all over the boards to "wear tennis shoes, very important for your comfort and all the walking." Then I read where evryone says you have to dress up in Rome, etc to get into the museums. Just wondering if everyone wore their nice clothes with shawls covering theirr shoulders as required, and then just wore tennis shoes? Am I understanding this right? Just wondering becasue I plan on taking nice dresses, etc that cover my knees to get into the Sistine Chapel, etc. , but of course realize that dress shoes would result in many blisters...Any help would be appreciated. Leaving Aug 30th on Brilliance of the Seas 12 nite Mediter. cruise...Can't wait!