17th
Fun Fact About Nyack
From Wikipedia, but it was also in the NY Times:
In 1991 the landmark court case Stambovsky v. Ackley ruled that a house at 1 LaVeta Place on the Hudson River was legally haunted and that the owner (but not the real estate agent) was required to disclose that to prospective buyers. The owner, Helen Ackley, earlier had organized haunted house tours and was party to an article about it in Readers Digest. After Ackley sold the house to another buyer there were no recent reports of hauntings