NEW YORK (AP) — Sotheby’s is auctioning a self-portrait by Andy Warhol that was recently found after being forgotten in a closet in New York City for more than 40 years.

The painting belongs to Cathy Naso. She was 17 years old when she got a part-time job as a receptionist at Warhol’s Factory.

Two years later, in 1967, Warhol gave her a self-portrait inscribed to her.

The Brooklyn resident displayed the painting briefly and then stored it in a closet. It remained there until this year.

It is on display at Sotheby’s New York offices starting Friday and will be auctioned at a Nov. 11 sale of contemporary art.

The auction house estimates it will sell for $1 million or more.