The Shell House is a historic home located at Glen Cove

Glen Cove, New York

Glen Cove is a city in Nassau County, New York on the North Shore of Long Island. As of the United States 2010 Census, the city population was 26,964....

 in Nassau County, New York

Nassau County, New York

Nassau County is a suburban county on Long Island, east of New York City in the U.S. state of New York, within the New York Metropolitan Area. As of the 2010 census, the population was 1,339,532...

. It was built as a guest cottage and home of the yacht captain on the Matinecock Point Estate of J. P. Morgan, Jr.

J. P. Morgan, Jr.

John Pierpont "Jack" Morgan, Jr. was an American banker and philanthropist.-Biography:He was born on September 7, 1867 in Irvington, New York to John Pierpont Morgan, Sr. and Frances Louisa Tracy. He graduated from Harvard in 1886, where he was a member of the Delphic Club, formerly known as the...

 (1867-1943). The house is composed of a small, Norman style core dated to the mid-19th century, with a large Tudor Revival addition built about 1910. Also on the property are the remains of a pier and a poured concrete and cinder block

Cinder block

In the United States, a concrete masonry unit – also called concrete block, cement block, and foundation block – is a large rectangular brick used in construction. Concrete blocks are made from cast concrete, i.e. Portland cement and aggregate, usually sand and fine gravel for high-density blocks...

 wall.

It was listed on the National Register of Historic Places

National Register of Historic Places

The National Register of Historic Places is the United States government's official list of districts, sites, buildings, structures, and objects deemed worthy of preservation...

in 1988.