Isaiah Rogers, a well known architect based in Cincinnati at the time, was recruited to supervise the final stages of the Statehouse's construction. During his tenure, Rogers oversaw completion of the building's interior and coordinated work on the distinctive rotunda and its enclosing cupola. One of the building's most distinctive exterior features is the low, conical roof atop the cupola, positioned where many viewers expect to see a dome. In the long span between beginning construction on the Statehouse and its completion, the "finished" design changed many times and various proposals included a round dome atop the building. Rogers, in deciding not to use a dome, was actually reverting to a design scheme by architects West and Sawyer. In the end, the building featured a low conical roof that some critics would deride as "a Chinese hat." Construction of Capitol Square, including its buildings, grounds, and landscaping, was finally completed in 1861.