Kawkaba: Highlights from the Barjeel Art Foundation, a new exhibition of works by artists from across the Middle East and North Africa that opened recently at Christie’s in London, bears the name of the Arabic word for constellation. Fittingly, it shines a light on the region’s mid-century moment when art was often part of a process of post-colonial nation building. The exhibition is a star-studded journey through the region’s 20th century histories and aesthetics, showcasing lesser-known artists along with the greats.