A timeline by Nekromans.
The "Kingdom and a Horse" TL focuses on an alternative outcome to the Battle of Bosworth, with Richard III winning and Henry Tudor dying in battle. This event butterflies a number of other events into being, including a personal union of Iberia under the Portuguese throne, Columbus sailing for England, and the drawing of England into the various Habsburg personal unions.
The TL currently runs from the 1480s to the 1530s, though it is progressing (semi-)quickly.
The timeline can be found on the template to your left.