Downtown Tel Aviv won’t come as a surprise to students of modern design. But for those for whom a mention of Israeli architecture conjures images of the Wailing Wall or some far-flung kibbutz, the density, urbanity, and bracing modernity of the city—founded only in 1909, unlike nearby Jaff a, which is over 3,000 years old—are a shock. Sporting, perhaps, the greatest collection of Bauhaus architecture in the world, the Tel Aviv–Jaff a metropolis is also incredibly dense, with around 40 percent of Israel’s population and some 18,500 people per square mile. As a point of comparison, that’s denser than the São Paulo, Shanghai, and New York metro areas. Interwar modernist architects who immigrated to British-controlled Palestine are responsible for the city’s unique architectural character. But those designers of the 1930s,…