The "Benin Bronzes", portrait figures, busts and groups created in iron, carved ivory, and especially in brass (conventionally called "bronze"), were taken from the city by the British and are currently displayed in various museums around the world. Some of the bronzes were auctioned off to compensate for the expenses incurred during the invasion of the city. Most of these artifacts can be found today in British museums and other parts of the world. In recent years, various appeals have gone to the British government to return such artifacts. The most prominent of these artifacts was the famous Queen Idia mask used as a mascot during the Second Festival of Arts Culture (FESTAC '77) held in Nigeria in 1977 now known as "Festac Mask".