Sonnenberger Straße 26/28 Sonnenberger Straße 26/28© wiesbaden.de In 1899, the architect Wilhelm Boue erected the double villa at Sonnenberger Straße 26/28 in the neo-Baroque style. Between 1905 and 1935, the building housed the Regina Hotel. City Map Sonnenberger Strasse 26/28© wiesbaden.de Share content Facebook Twitter WhatsApp