The Rialto Building was a ten-story Romanesque Revival office block at the southeast corner of 4th and Olive Streets, designed by Isaac S. Taylor and completed in 1892. Measuring 90 by 83 feet with 135 offices and a construction cost of $500,000, it was one of the more substantial commercial buildings Taylor produced during the decade that established him as downtown St. Louis's preeminent commercial architect. Its façade was distinguished by bay windows and a large projecting cornice — characteristic elements of the Romanesque Revival style that Taylor deployed across much of his downtown commercial work during this period.
The Rialto Building rose at the southeast corner of 4th and Olive Streets in 1892, during the same intensely productive decade in which Isaac Taylor completed dozens of commercial buildings in the downtown core. Taylor had established himself as the city's leading commercial architect through the late 1880s and early 1890s, and the Rialto — named for the famous mercantile district in Venice, a naming convention popular among American commercial buildings of the era — was among the largest of his downtown commissions, offering 135 offices across ten floors. The building occupied a prime location at the intersection of 4th and Olive Streets, at the heart of St. Louis's bustling business district. Its demolition date is unrecorded, though like many of Taylor's downtown commercial buildings the Rialto was lost to the redevelopment pressures that transformed the city's core throughout the twentieth century.
