Tilbury Fort, c17th century, (c1960s)

Tilbury Fort, c17th century, (c1990-2010). An aerial reconstruction drawing. An artillery fort on the north bank of the River Thames in England. The earliest version of the fort, comprising a small blockhouse with artillery covering the river, was constructed by King Henry VIII to protect London against attack from France as part of his Device programme, the fort was enlarged by Sir Bernard de Gomme from 1670 onwards to form a star-shaped defensive work, with angular bastionsArtist Alan Ernest Sorrell. (Photo by English Heritage/Heritage Images/Getty Images)