Rehoboth is a historic former barn located on Aldridge Road in Chappaqua, New York, United States. It is a concrete structure that has been renovated into a house with some Gothic Revival decorative elements. In 1979 it was listed on the National Register of Historic Places. It was designed and built in the mid-19th century by newspaper editor and activist Horace Greeley as one of the agricultural experiments he dabbled in, testing whether concrete would make a good building material for farms. It was one of the first concrete structures in the country, and the first concrete barn. Greeley was so satisfied with the result he predicted that he would be remembered for it if nothing else. Two decades after Greeley’s death, his daughter Gabrielle and her husband, The Rev. Frank Clendenin, pastor of a New York City Episcopal church, commissioned architect Ralph Adams Cram to remodel it into their house, which he named Rehoboth. They lived there for the rest of their lives, the remodeled house becoming one of the centers of Chappaqua’s social life as it completed its metamorphosis from country town to suburb. It has remained a private home since then.