Question: What building was added to the National Register of Historic Places at the same time as the oldest building on Monument Square?
Related documents: [0]  [DOC] The Cannon Building in Troy, New York is located on Broadway between First and State streets. It is the oldest building on Monument Square. It was designed by Alexander Jackson Davis and built in 1835. In 1970 it was listed on the National Register of Historic Places. It is also a contributing property to the Central Troy Historic District, listed on the Register in 1986. [END] 
[1]  [DOC] The McCarthy Building is located on River Street on the west side of Monument Square in Troy, New York, United States. It was built in 1904 by Peter McCarthy, president of Troy Waste Manufacturing Co., and remains in use as a commercial building. In 1970 it was added to the National Register of Historic Places in 1970, along with the nearby Cannon Building. Since 1986 it has also been a contributing property to the Central Troy Historic District. [END] 
Answer: 
McCarthy Building
McCarthy Building