Plaster walls can't hold weight on their own, but the right tools can help you hang more than you think. Plaster was the construction standard up until the 1940s, when drywall burst onto the market.
Lath-and-plaster walls are common in older houses (built late 18th Century until the early 1950’s, when drywall became standard). Whether you want to hang a picture, mirror or kitchen cabinet, ...