Christie’s has been entrusted to sell the art collection owned by the late architect I.M. Pei and his wife.

The collection is described as exceptional selection of paintings, drawings, works on paper and sculpture assembled by the celebrated international architect and his wife over the course of their 72-year marriage.

The full collection of 59 works is expected to exceed $25 million.

Pei designed some of the world’s most iconic buildings including the Pyramid at the Louvre in Paris, the Bank of China Tower in Hong Kong, the Rock & Roll Hall of Fame in Cleveland and the main tower of Commerce Court West in Toronto.

Pei died in May in New York at the age of 102.