Uppsala Cathedral
He was chief of Board superintendent for the administration of state buildings ("Överintendentsämbetet") from 1882–97. Zettervall was the chief architect in the restoration of old buildings and churches in Sweden during the period 1860–90. Among other commissions, Zettervall designed the plans for the renovation of Lund Cathedral (1860–1902) and Uppsala Cathedral (1886–1893). He was appointed to several other large scale restorations including Linköping Cathedral (1877–86), Skara Cathedral (1886–94) and Uppsala Cathedral (1885–93), as well as the Kalmar Castle (1886–90).