Where is the US Court of Appeals for the First Circuit?

The court is based at the John Joseph Moakley Federal Courthouse in Boston, Massachusetts. Most sittings are held in Boston, where the court sits for one week most months of the year. The First Circuit also sits for one week each in March and November at the Jose V. Toledo Federal Building and United States Courthouse in Old San Juan, Puerto Rico, and occasionally sits at other locations within the circuit.