Back in its 4th century days, Split's Cathedral of St. Dominus was not actually a cathedral at all; it was built as the original resting place of the newly deceased Roman Emperor Diocletian. It wasn't until the dawn of the 7th century that the structure was consecrated as a house of worship, followed some 500 years later by the addition of its sizable bell tower. And today? Well, today this centuries-old church (dubbed Sveti Duje by locals) is both one of the oldest original Catholic cathedrals still in use, as well as Split's most recognizable cultural landmark. Should you pay it a visit in summer, you'll undoubtedly be sharing the view with hundreds of gawking tourists eager to ascend the bell tower and appreciate it's 360 degree panorama of the city below. Unfortunate, yes, however if you don't mind the crowds (and have 45 minutes to spare) the tower, the ornately decorated cathedral itself and its impressive treasury can provide a cool cultural/historic experience. Just be aware that access to these areas will set you back around 45 kuna ($8 USD) if you purchase an all-entry ticket.