Built in 1892 in Oak Park, the Robert P. Parker House was designed by Frank Lloyd Wright during his early years, before his Prairie School work. Built by Thomas H. Gale and sold that year to attorney Robert P. Parker, it became one of Wright’s best-known bootleg houses, designed while he was still employed by Adler and Sullivan, whose firm forbade outside commissions. Its Queen Anne character, polygonal dormers, irregular roofline, spacious interior plan, and geometric simplification reveal Wright testing influences from Joseph Silsbee and Louis Sullivan at a formative moment in his architectural development. It is now part of the Frank Lloyd Wright–Prairie School of Architecture Historic District.