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This spider is the most commonly seen spider in a structure. They are found worldwide and can be found in any room of a structure, not just the cellar. They spin a web in the corners of rooms with low light. They are not aggressive towards you and pose no threat to you.
The best defense is to physically eliminate the spiders seen in corners, but if populations are high, glue boards and spot treating inside will be necessary. An exterior treatment can be done, but will not solve the problem entirely indoors.