I found this beautiful wood-carved sculpture:
It does look quite old and I wonder around what it was created. Also I'm interested which things to look out for, in order to determine the age and possibly spot newer imitations.
To date this sculpture, you could look at pictures and other sculptures and compare the style of clothing. Or take a book about medieval clothing and try to determine the period of the clothing this way. Probably a combination of these two approaches would be a good idea.
Edit: The determination of the clothing gives you a starting point for your research, a date after which the sculpture is done.
The headpiece looks to me like a Hennin which would put it roughly in the 15th century. Also the dress seems to fit in this period, compared for example with this painting from Hans Memling, Portrait of a young woman / bride from the second half of the 15th century.