 Most were later judged by inspecting engineers/architects as structurally sound with their steel I-beam cage framing and masonry facades and were reconstructed and rehabilitated in the next five years in a flurry of downtown rebuilding.The next period from the 1910s to the late 1920s, during which time the Baltimore Trust Company Tower (now the Bank of America Building) were constructed.The City's central business district then experienced a long fallow period due to the Great Depression of the 1930s and the defense industrial efforts of World War II where very few skyscrapers were constructed and the downtown remained relatively stable.