Upsala is a historic mansion in Mount Airy, Philadelphia, Pennsylvania that was the site of an American concentration of forces during the Battle of Germantown, used as a staging ground for the attack on British forces at Cliveden across the street. Dirck (or Dirick) Jansen owned the land before 1775. The older, rear part of the house was built around 1745. John Johnson, Sr. is said to have bought the land in 1766. There is speculation over whether father or son owned the house first. John Johnson, III inherited the property in 1797 and built the front section of the house.