There are many Grade I listed buildings in Mid Suffolk, a non-metropolitan district of in the county of Suffolk in England. In the United Kingdom, the term listed building refers to a building or other structure officially designated as being of "exceptional architectural or historic special interest"; Grade I structures are those considered to be "buildings of "exceptional interest, sometimes considered to be internationally important. Just 2.5% of listed buildings are Grade I." The total number of listed buildings in England is 372,905. Listing was begun by a provision in the Town and Country Planning Act 1947. Listing a building imposes severe restrictions on what the owner might wish to change or modify in the structure or its fittings. In England, the authority for listing under the P