Nuits, also known as the Cottenet–Brown House, is an Italian villa-style house located in the Ardsley-on-Hudson section of the village of Irvington, New York, United States. It is a stone Italian villa-style house built in the mid-19th century. In 1977 it was listed on the National Register of Historic Places.

Detlef Lienau was a German architect born in Holstein. He is credited with having introduced the French style to American building construction, notably the mansard roof and all its decorative flourishes. Trained at the École des Beaux-Arts, Paris, he designed virtually every type of Victorian structure—cottages, mansions, townhouses, apartment houses, hotels, tenements, banks, stores, churches, schools, libraries, offices, factories, railroad stations, and a museum. Lienau was recognized by clients and colleagues alike as one of the most creative and technically proficient architects of the period, and was one of the 29 founding members of the American Institute of Architects.