For much of its architectural history, Moscow was dominated by Orthodox churches. However, the overall appearance of the city changed drastically during Soviet times, especially as a result of Joseph Stalin's large-scale effort to "modernize" Moscow. Stalin's plans for the city included a network of broad avenues and roadways, some of them over ten lanes wide, which, while greatly simplifying movement through the city, were constructed at the expense of a great number of historical buildings and districts. Among the many casualties of Stalin's demolitions was the Sukharev Tower, a longtime city landmark, as well as mansions and commercial buildings The city's newfound status as the capital of a deeply secular nation, made religiously significant buildings especially vulnerable to demolition. Many of the city's churches, which in most cases were some of Moscow's oldest and most prominent buildings, were destroyed; some notable examples include the Kazan Cathedral and the Cathedral of Christ the Savior. During the 1990s, both were rebuilt. Many smaller churches, however, were lost.