23 June 20198 July 2022 Castles on the Rhine Burg Pfalzgrafenstein Castle on Falkenau Island in the Rhine River, opposite the village of Kaub and below the Schlosshotel Gutenfels in Germany. Burg Pfalzgrafenstein was built by Mad King Ludwig the Bavarian in 1326 as a toll castle to generate revenue. Gutenfels, now a hotel, was built in 1220. Ink and watercolour painting by Dai Wynn on 300gsm medium texture Arches cotton paper. 29.5 cm high by 42 cm wide by 0.1 cm deep approximately. A3 standard size.