Not the oldest part of the city. That honor goes to Beacon Hill, but much of this area dates to the 1800s, some of it a bit earlier. A mix of commercial, cultural, and residential, it provides an interesting look at the architecture of the times.
The area is now known as “Symphony” since it is dominated by Symphony Hall. The Berkeley School of Music is here, music store, other smaller concert and performance venues. It’s very music-centric.