Wells Cathedral is an Anglican cathedral in Wells, Somerset, commenced around 1175; it is predominantly built in the Early English style. This interior view shows the Lady Chapel, which was begun by Thomas Witney, possibly around 1310. The chapel has an asymmetrical octagonal plan, resulting in a somewhat irregular vault (arched ceiling), which is one of the earliest lierne vaults in England. The main ribs are intersected by non-supporting lierne ribs, which form a star-shaped pattern at the apex. The window tracery is in the Reticulated Gothic style, with a pattern of repeated trefoils, giving a "reticulate" or net-like appearance. Four of the five contain fragments of medieval glass.Photograph credit: David Iliff