Christie's Paris offers a collection assembled over four decades by a major Parisian collector Alexander Calder, Sans titre. Estimate: 70,000-100,000. © Christie's Images Ltd 2021. PARIS .-Christie's will be offering an exceptional collection focusing on modern and post-war art assembled over four decades by a major Parisian collector on 30 March. This lover of Paris, the city that welcomed him as a teenager when he came from his home in north Africa, carefully selected works of the highest quality by major artists from the end of the 19th century to the 1950s. Throughout his quest, our co...