Getting ready for the 1st of May

Initially built in around 1300 based on a principle thought to have been imported (by returning Crusaders) from Egypt and Mesopotamia, the maintenance of the ten Möhrendorf waterwheels is now the work of the Möhrendorf Waterwheel Association whose charming website – complete with English version – is well worth a browse:
http://www.schoepfraeder.de/english/index.htm
Each comprising some 600 individual wooden parts and held together with wooden nails and wedges, one wheel produces the equivalent of 40 tankers in one day, from May to September, when they are then dismantled and put away for the winter – every year.