 The Grade I listed buildings in Somerset , England , demonstrate the history and diversity of its architecture . The ceremonial county of Somerset consists of a non @-@ metropolitan county , administered by Somerset County Council , which is divided into five districts , and two unitary authorities . The districts of Somerset are West Somerset , South Somerset , Taunton Deane , Mendip and Sedgemoor . The two administratively independent unitary authorities , which were established on 1 April 1996 following the breakup of the county of Avon , are North Somerset and Bath and North East Somerset . These unitary authorities include areas that were once part of Somerset before the creation of Avon in 1974 . 
 The Grade I listed buildings in Somerset , England , demonstrate the history and diversity of its architecture . The ceremonial county of Somerset <a href='uninflect' title='1'><mark>consists</mark></a> of a non @-@ metropolitan county , administered by Somerset County Council , which is divided into five districts , and two unitary authorities . The districts of Somerset <a href='drop_aux' title='2'><mark>are</mark></a>West Somerset , South Somerset , Taunton Deane , Mendip and Sedgemoor . The two administratively independent unitary authorities , which <a href='uninflect' title='3'><mark>were</mark></a> established on 1 April 1996 following the breakup of the county of Avon , <a href='drop_aux' title='4'><mark>are</mark></a>North Somerset and Bath and North East Somerset . These unitary authorities include areas <a href='null_relcl' title='5'><mark>that</mark></a><a href='uninflect' title='6'><mark>were</mark></a> once part of Somerset before the creation of Avon in 1974 . 
Da Grade I listed buildings in Somerset , England , demonstrate the history and diversity of its architecture . Tdaceremonial county of Somerset consist of a non @-@ metropolitan county , administered by Somerset County Council , which is divided into five districts , and two unitary authorities . Thdaistricts of Somerset West Somerset , South Somerset , Taunton Deane , Mendip and Sedgemoor . The two administratively independent unitary authorities , which was established on 1 April 1996 following thedaeakup of the danty of Avon , North Somerset and Bath and North East Somerset . These unitary authorities include areas was once part of Somerset before the cdation of Avon in 1974 .