One of the top attractions in any city that you visit is most often an old cathedral. If you're visiting Europe, or you have already visit a city from the old continent, you can easily tell that a lot of effort was put into the cathedral. Not only they were and some of them still are important religious places, but the way they were built is also fascinating. Most of the cathedrals you will see on this list are built in Gothic style, meaning that they are all very, very old! The fact that th...