P. J. Barrett Block
 The P.J. Barrett Block is a historic block at 70—76 Park Street in Adams Massachusetts. It is one of the four brick buildings on Park Street along with the Jones Block Armory Block and the Mausert Block opposite the Town Hall. The block was built in roughly 1880 during a period of rapid industrial expansion in Adams. The original uses of the building were to provide retail shops on the ground floor and apartment-style housing above a common feature of buildings of the period.