Please answer the following question: HMP Shepton Mallet sometimes known as Cornhill is a former prison located in Shepton Mallet Somerset England. Prior to closure it was the United Kingdom's oldest operating prison.Before closure Shepton Mallet was a Category C Lifer Prison holding 189 prisoners. The prison building is grade II* listed. Its closure was announced in January 2013. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Building