The Battle of the Astronomy Tower, also known as the Battle of the Lightning-Struck Tower, was a battle of the Second Wizarding War that took place in the topmost tower of Hogwarts School of Witchcraft and Wizardry in the evening of 30 June, 1997. It occurred as the design of Tom Marvolo Riddle (Lord Voldemort), who had ordered sixteen-year-old Death Eater Draco Malfoy to find a way to sneak other Death Eaters into the school and to assassinate Albus Percival Wulfric Brian Dumbledore, the leader of the Order of the Phoenix. Malfoy was able to do the former, but was unable to do the latter. As the Order and the Death Eaters battled, Severus Snape killed Dumbledore, an act that was later discovered to have been planned between Dumbledore and Snape.

There were two casualties, Dumbledore and one Death Eater, but Bill Weasly was injured by Fenrir Greyback. He is not a werewolf, but has some wolfish characteristics.