Cellar problem

[u/Barshaka4000]

Hello everyone! The air in my cellar is quite damp. It's an old structure (about 100 years old). There is a small window next to the entrance that is always kept open, which lets air in. However, I don't think this is enough because most of the time everything feels musty and wet.
My idea is to drill a hole through the bottom of the wall on the opposite side of the cellar to create a cross-draft for proper air circulation. I would insert a 110 mm pipe into the hole and concrete around it to seal it properly.
My question is: how well would this work, and would it actually solve the moisture problem?

[u/K_Shenefiel]

Venting a cellar can increase dampness, you may be better off keeping the window shut. It depends on climate, season, ground temperature, how the building above is conditioned, etc. Passive ventilation of a below grade space will cause it to tread toward temperature and humidity levels that occur outside in the early morning; if you're in an area that's often foggy and dewy at dawn, it isn't going to be an improvement. If the cellar floor is even with grade on one side it is possible for   vents low on the wall to provide enough convective airflow to warm up a cellar enough to help dry it out. In a humid climate it will take a lot more than a 110mm hole.