In 1988, Rego was the subject of a retrospective exhibition at the Calouste Gulbenkian Foundation in Lisbon and the Serpentine Gallery in London. This led to her being invited to become the first Associate Artist at the National Gallery, London in 1990, in what was the first of a series of artist-in-residence schemes organized by the gallery. From this emerged two sets of work. The first was a series of paintings and prints on the theme of nursery rhymes, which was taken around Britain and elsewhere by the Arts Council of Great Britain and the British Council from 1991 to 1996. The second was a series of large-scale paintings inspired by the paintings of Carlo Crivelli in the National Gallery, known as "Crivelli’s Garden" which is now housed in the main restaurant at the gallery.