As part of the Palmerton Area Historical Society's 20th birthday celebration, the September event will be an open house from 2 to 4 p.m. Sept. 19, at the society's archives in the Palmerton Borough Hall. There will be a power point program, tour of the facilities and light refreshment. Many people are not aware of the existence of this site. Take this opportunity to learn all about the steps through which a donation goes once it enters in the society's care.