On 10 June 1886, Luitpold's nephew King Ludwig II was declared mentally incompetent and Luitpold was named Regent. Luitpold's part is still controversial. Following Ludwig II's mysterious death a few days later, his brother Otto assumed the throne. However, Otto was likewise (or more so) mentally incapable of reigning; he had been under medical supervision since 1883. Accordingly, Luitpold continued to serve as regent. Prince Luitpold was even accused by some people of the murder of his nephew, but soon the decent and affable prince became one of Bavaria's most popular rulers. One of his first actions (on 1 August 1886) was to open several of the palaces of Ludwig II to the public.