The castle of Doragno is the result of the transformation and extension of an ancient medieval fortress into a private residence. In a nutshell – Doragno castleAddress Via Doragno 1, 6821 Rovio, SwitzerlandLocation 45°56′02″N 8°59′13″EAltitude 497 MAMSLPhoto Luciano Carugo InformationBuilding typology ResidentialConstruction type RetrofitYear of construction 2017Peak power 16.4 kWpEnergy production 16,400 kWh/aBuilding skin application Solar tilesProduct Custom madeManufacturer ISSOL Switzeland SAArchitect deltaZERO / Stefano De Angelis e Maria MazzaPhotovoltaic installer Greenkey Sagl – Kim Bernasconi The Doragno CastlePhoto: Luciano CarugoAerial viewPhoto: m.fontanasothebysrealty.comBefore the retrofitPhoto: deltaZERO SABetween old and newPhoto: Luciano CarugoIndoor viewPhoto: Luciano Carugo