It had been roughly... twenty years since Nikolai had set foot onto the Hogwarts grounds, and despite the current state of the library and other areas in the school, the castle looked much like it had back when he was a student here.

Nikolai Vannacutt, businessman, ex-professional quidditch player, and confirmed bachelor, did not enjoy the feeling of being back here. Especially not in this particular section. The library was where most of the best (and worst) things had happened to him in his adolescent years.

Maybe that's why he had come to give money for its restoration. Let others have the same memories.