"The Bazaar was an amusing concoction of Moorish, Egyptian, and Gothic elements. It was one of the first examples of the spirit of Eclecticism - drawing upon historic styles from various exotic cultures - which came to dominate American building for the remainder of the century.""Cincinnatians and visitors, who were accustomed in public buildings to the simplicity of the vernacular [...] delighted in attaching what they regarded as the tastelessness of the 'bizarre bazaar'."
The Trollopean Bazaar was designed by Seneca Palmer in 1829. He was one of Cincinnati's only architects (mockitects?) at the time and the designer of several significant architectural landmarks in the city. For more information, see Cincinnati the Queen City by Daniel Hurley (Cincinnati: Cincinnati Historical Society, 1982). This article references excerpts from chapter 1 of that text.