An important cultural and artists' centre in Maputo is the Associação Núcleo de Arte. It is the oldest collective of artists in Mozambique. Seated in an old villa in the centre of Maputo the Núcleo has played a significant role in metropolitan cultural life for decades. The two best known and most influential contemporary Mozambican artists started their career at Núcleo de Arte, the painter Malangatana Ngwenya and the sculptor Alberto Chissano. Over one hundred painters, sculptors and ceramists are members of the Núcleo, which regularly stages exhibitions on its own premises and over the last few years has actively participated in exchanges with artists from abroad. The Núcleo became well known for their project transforming arms into tools and objects of art. It played an important role for reconciliation after the Mozambican Civil War. The exhibition of art objects such as the Chair of the African King and the Tree of Life was shown around the world, among others in the British Museum in 2006.