A 1943 landscape painted by Winston Churchill and which the wartime British prime minister gifted to U.S. President Franklin D. Roosevelt is expected to fetch up to $3.5 million when it is sold at auction next month.

Churchill painted “Tower of the Koutoubia Mosque” in Marrakech following the January 1943 Casablanca Conference, which both leaders attended. Churchill then took Roosevelt to Marrakech to see the sun set over the Atlas Mountains.

The work is to be sold from Hollywood actor Angelina Jolie’s Jolie Family Collection, with an estimated price tag of 1.5 million pounds – 2.5 million pounds ($2.08 million – $3.47 million).

“Churchill painted nothing in the Second World War except this one painting,” Nicholas Orchard, head of the Modern British Art department at Christie’s.

“Churchill painted it for Roosevelt … And so it signifies not just their friendship but also the special relationship between Britain and America. The other factor is that Churchill considered his North African views to be a cut above all his other paintings.”

Churchill, who took up painting in his forties, first visited Morocco in 1935 and painted around 45 pictures of the country, according to Christie’s.