Johann August Karl Soller (14 March 1805 – 6 November 1853) was a Prussian, and later, German architect. He was one of the most important of Karl Friedrich Schinkel's pupils and is regarded as a representative of the Schinkel school. Soller became an influential proponent of Rundbogenstil, a Romanesque revival architectural style that became popular in German-speaking lands and among German diaspora during the 19th century.