George IV built the Fishing Temple on Virginia Water both for fishing and as an additional place to which to escape from Windsor Castle itself during hot weather.
It was built from 1825, to the designs of Sir Jeffry Wyatville. It was decorated at the end of the 1820s by Frederick Crace in an elaborate oriental style. The King had used rigid tents erected nearby during the building of the Temple, and these remained as additional accommodation after it was completed. George IV's Temple gradually decayed after his death and was finally demolished in 1867. It was replaced by a featureless building in a vaguely Swiss style (J. Roberts, Royal Landscape: The Gardens and Parks at Windsor, New Haven, 1997, pp. 413-423)