Swiss National Museum
He designed the Swiss National Museum, and was involved in the construction of the "Urania" complex in Zürich that comprises Amtshaus I-IV at the Lindenhof hill, as well as the Stadthaus Zürich at Münsterhof, Urania Sternwarte and Waisenhaus Zürich at Lindenhof hill, and the tower of Predigerkirche Zürich that was built after Gull's plans by Friedrich Wehrli.