Giant spider sculptures (11 feet tall and 22 feet across) described as "looming and powerful protectresses, yet are nurturing, delicate, and vulnerable" and a "favorite with children" have been found in Washington DC, Denver CO, and elsewhere. Even larger sculptures are found in places like Ottawa and Zürich. These sculptures, two series of six by Louise Bourgeois, can be seen at the National Gallery of Art, Denver Art Museum, London's Tate Modern and in a few other select sculpture gardens. The larger series is titled "Maman" and the other simply titled "Spider". One "Spider" was sold at a Christie's auction house for over $10 million.