Tbilisi's postwar architecture is similar to the brand of midcentury modernism found across the Soviet Union. The city expanded dramatically in response to a housing crisis after World War II. Entire neighborhoods (Saburtalo, Dighomi) appeared on the outskirts of the city in a matter of decades, built with advances in mass-production technology. Georgian architects produced some of the Soviet Union's most interesting architectural achievements, including Tbilisi's 1975 Ministry of Roads and the 1984 Wedding Palace. Since the collapse of the Soviet Union, the urban landscape is largely characterized by unregulated construction. New towers occupy formerly public spaces and overcrowded apartment buildings sprout "kamikaze loggia" overnight. Since 2004, the city government has taken initiatives to curb uncontrolled construction projects with mixed success. Soon Tbilisi will have three skyscraper complexes. The Axis Towers, Redix Chavchavadze 64, and the new Ajara Hotel/Business Complex, which is currently under construction, will be the tallest buildings/skyscrapers in the Caucasus.