LONDON (AP) — A major painting by modernist master Piet Mondrian is to be sold at auction for the first time with an estimated price of 13 million pounds to 18 million pounds ($22 million to $30 million).

Sotheby’s said Wednesday that “Composition With Blue and Gray,” completed in 1927, has been in a private collection for 50 years. Sotheby’s did not identify the owner.