Lotho Needham was the master architect that designed Hogwarts. He spent years planning and designing the nooks and crannies of the castle that were his ultimate pride and joy. He was master of every aspect of the construction of Hogwarts, working himself into a state of constant illness. His assistant was the fore-elf Jodo, who carried out his orders to the letter. After Hogwarts was completed, he lived and worked there for several years as the it's first Keeper of Keys.