Albert Einstein. Ostwald donated more than US$40,000 of his Nobel Prize award money to advance the cause of the Ido language. In 1923, Ostwald was awarded the Wilhelm Exner Medal, which recognized the economic impact of Ostwald's scientific contributions. In 1904 he was elected a foreign member of the Royal Netherlands Academy of Arts and Sciences. He became an honorary member of scientific societies in Germany, Sweden, Norway, the Netherlands, Russia, Great Britain, and the United States. Ostwald received honorary doctorates from various universities in Germany, Great Britain and the United States. In 1899 he was made a Geheimrat by the King of Saxony, which by that time was a recognition of Ostwald's scholarly contributions. There is a Wilhelm Ostwald Park and Museum in Grimma, Germany, at the site of Ostwald's vacation home. This institution also houses many of Ostwald's scholarly works. Ostwald crater, which is on the far side of the Earth's moon, was named in honor of Wilhelm Ostwald. Personal life On 24 April 1880 Ostwald married Helene von Reyher (1854–1946), with whom he had five children. These were: Grete, (1882–1960) born in Riga and died in Großbothen; Wolfgang (1883–1943) born 1883 in Riga and died in Dresden; Elisabeth (1884– 1968) born in Riga and died in Großbothen; Walter (1886–1958) born in Riga and died in Freiburg im Breisgau; and Carl Otto (1890–1958) born in Leipzig and died in Leipzig. Wolfgang Ostwald became a notable scientist in the area of colloid chemistry. Ostwald was initiated to the Scottish Rite Masonry and became Grand Master of the Grand Lodge "Zur Aufgehenden Sonne" in Bayreuth. In 1887, he moved to Leipzig where he worked for the rest of his life. At the time of his retirement, he moved to a country estate near Groβbothen, Saxony, which he named "Landhaus Energie". He lived at the country estate for most of the remainder of his life. On his religious views, Ostwald was an atheist. Ostwald died in a hospital in Leipzig on 4 April 1932, and was buried at his country estate in Großbothen, near Leipzig, and then re-interred in the Great Cemetery of Riga. In fiction Ostwald appears as a character in Joseph Skibell's 2010 novel, A Curable Romantic. He is also mentioned in Italo Svevo's 1923 novel, La coscienza di Zeno, translated as Zeno's Conscience. Representative publications Books Lehrbuch der allgemeinen Chemie. Leipzig: W. Engelmann, 1896–1903. (2 vols.) Leitlinien der