Picasso to diversify its investments and serve as a guarantee for the insured risks. Following an air disaster in 1967, the company had to pay out heavy reimbursements. The company decided to part with the two paintings, which were deposited in the Kunstmuseum Basel. In 1968, a large number of Basel citizens called for a local referendum on the purchase of the Picassos by the Canton of Basel-Stadt, which was successful, making it the first time in democratic history that the population of a city voted on the purchase of works of art for a public art museum. The paintings therefore remained in the museum in Basel. Informed of this, Picasso donated three paintings and a sketch to the city and its museum and was later made an honorary citizen by the city. Auction history Several paintings by Picasso rank among the most expensive paintings in the world. Garçon à la pipe sold for US$104 million at Sotheby's on 4 May 2004, establishing a new price record. Dora Maar au Chat sold for US$95.2 million at Sotheby's on 3 May 2006. On 4 May 2010, Nude, Green Leaves and Bust was sold at Christie's for $106.5 million. The 1932 work, which depicts Picasso's mistress Marie-Thérèse Walter reclining and as a bust, was in the personal collection of Los Angeles philanthropist Frances Lasker Brody, who died in November 2009. On 11 May 2015 his painting Women of Algiers set the record for the highest price ever paid for a painting when it sold for US$179.3 million at Christie's in New York. On 21 June 2016, a painting by Pablo Picasso titled Femme Assise (1909) sold for £43.2 million ($63.4 million) at Sotheby's London, exceeding the estimate by nearly $20 million, setting a world record for the highest price ever paid at auction for a Cubist work. On 17 May 2017, The Jerusalem Post in an article titled "Picasso Work Stolen By Nazis Sells for $45 Million at Auction" reported the sale of a portrait painted by Picasso, the 1939 Femme assise, robe bleu, which was previously misappropriated during the early years of WWII. The painting has changed hands several times since its recovery, most recently through auction in May 2017 at Christie's in New York City. In March 2018, his Femme au Béret et à la Robe Quadrillée (1937), a portrait of Marie-Thérèse Walter, sold for £49.8m at Sotheby's in London.