The William Paca House and Garden is rumored to be haunted by a male apparition in colonial clothing, sometimes identified as William Paca himself, who is seen looking out the windows on the upper floor. Some sources suggest he was a man who died relatively young, a sentiment that aligns with the historical accounts of his first wife and children. A male apparition is believed to haunt the Paca House. The ghost is described as wearing colonial-era clothing. The apparition is often seen looking out the windows on the upstairs floor of the house. Some believe the spirit is that of William Paca, a former governor and signer of the Declaration of Independence.