Puzzle #3: Happy Birthday to Rome!
Per Roman legend, Rome was founded on April 21, 753 BCE. This is almost certainly not when it was actually founded, but let's celebrate with a puzzle anyways! As always, this is available as both a .puz/AmuseLabs and a .pdf. I would probably advise you to solve it as the AmuseLabs below, however, because some of the longer clues aren't formatted all that well in the .pdf PDF