The description on the front of the card:
Section of Museum Containing Priceless McKinley
McKinley Memorial, Niles, Ohio
The William McKinley Birthplace Memorial Library and Museum was built in 1915 in Niles, Ohio. The library is a public library and the museum features exhibits about President McKinley.
Estimated Date: 1950s
Series: William McKinley Memorial
Era: White Border Era
Publisher: Artvue Post Card Co., 225 Fifth Ave., New York, N.Y.
Artvue Post Card Company was formed in 1936 in New York City, New York, and produced black and white postcards in the 1950s. They bought the postcard company, Albertype Company, in 1952.
Rights Info: Most likely public domain due to inadequate copyright statements, but it would be best to credit the original publishers and distributors.