Please answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Gilbert Bridge - Gilbert Bridge also known as Hall Estate Bridge is a historic Pratt truss bridge in Monaghan Township York County Pennsylvania and Upper Allen Township Cumberland County Pennsylvania. It was built in 1899 and measures 102-foot-long (31 m) and 18-foot-wide (5.5 m) overall. The steel bridge was built by the Wrought Iron Bridge Company and crosses the Yellow Breeches Creek.It was added to the National Register of Historic Places in 1988.
A:
Building