Yes, fresh chestnuts are low histamine. They’re also a great source of dietary fiber, vitamin C, copper, and manganese, and they taste rich and mildly nutty when freshly-roasted. While they are high oxalate, this should not be an issue for most people with histamine intolerance, particularly if you get enough calcium in your diet. Chestnuts are native to temperate areas in the Northern Hemisphere, but they’re most highly connected to Italian cooking, where chestnut flour (farina di castagne) is a staple in certain desserts. Note that the chestnuts I’m talking about here are different from water chestnuts (which are actually a sedge, and incidentally are also low histamine & make a delicious flour).
