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When in that particular part of the world, I would see what the
locals are using, and emulate them []


Otherwise, I second Bill's suggestion of renting the 17-55 because for its high
quality, versatility, and low light capability. If you're taking pictures of non-moving stuff, the IS and short focal length makes it even more hand-holdable than the 24mm f/1.4.


Of the two lenses you have, I would bring the more versatile 70-200.


Renting the 10-22 isn't a bad idea either, but it strikes me as the type of thing you would not try for the first time on a trip to Rome (if you end up not liking wide angle, your stuck with nothing between 22 and 70mm).