Philip was first educated at The Elms, an American school in Paris run by Donald MacJannet, who described Philip as a "know it all smarty person, but always remarkably polite". In 1928, he was sent to the United Kingdom to attend Cheam School, living with his maternal grandmother, Victoria Mountbatten, Dowager Marchioness of Milford Haven, at Kensington Palace and his uncle, George Mountbatten, 2nd Marquess of Milford Haven, at Lynden Manor in Bray, Berkshire. In the next three years, his four sisters married German princes and moved to Germany, his mother was diagnosed with schizophrenia and placed in an asylum, and his father took up residence in Monte Carlo. Philip had little contact with his mother for the remainder of his childhood. In 1933, he was sent to Schule Schloss Salem in Germany, which had the "advantage of saving school fees" because it was owned by the family of his brother-in-law, Berthold, Margrave of Baden. With the rise of Nazism in Germany, Salem's Jewish founder, Kurt Hahn, fled persecution and founded Gordonstoun School in Scotland, which Philip moved to after two terms at Salem. In 1937, his sister Cecilie, her husband Georg Donatus, Hereditary Grand Duke of Hesse, her two young sons, Ludwig and Alexander, her newborn infant, and her mother-in-law, Princess Eleonore of Solms-Hohensolms-Lich, were killed in an air crash at Ostend; Philip, then 16 years old, attended the funeral in Darmstadt. The following year, his uncle and guardian Lord Milford Haven died of bone marrow cancer.