Complex sentence: In response to this vast growth, amid the Great Depression, the City erected between 1931 and 1934 the Bronx County Courthouse (Supreme Court building) on the Grand Boulevard and Concourse to replace the smaller Bronx Borough Courthouse, constructed between 1905 and 1914.
Split into simpler sentences: In response to this vast growth, amid the Great Depression, the City erected the Bronx County Courthouse (a.k.a. the Supreme Court building) between 1931 and 1934. This new building, on the Grand Concourse, replaced the smaller Bronx Borough Courthouse, constructed between 1905 and 1914.