On January 12, 2010 a devastating earthquake struck Port-au-Prince and its surrounding area and resulted in mass devastation. The Haitian art world suffered great losses in the earthquake. Museums and art galleries were extensively damaged, among them Port-au-Prince's main art museum, Centre d'Art, where many art works were destroyed. The collection at Collège Saint Pierre also was devastated, as was the collection of priceless murals in the Holy Trinity Cathedral. Some private art galleries were also severely damaged, including the Monnin Gallery in Pétion-Ville, and the Nader Art Gallery and Musée Nader in Port-au-Prince. The personal collection of Georges Nader Sr., the Nader collection was worth an estimated US$30-US$100 million. Shortly after the earthquake struck, UNESCO assigned special envoy Bernard Hadjadj to evaluate damage to artwork. The Smithsonian Institution, led by Under Secretary Richard Kurin, and with the assistance of the U.S. Embassy in Port-au-Prince and the Government of Haiti among others, embarked on a multiyear project and survey to help restore key Haitian cultural treasures and train local Haitians on art preservation and recovery techniques.