From Wikipedia: Diana – also known as Diana of the Tower – is an iconic statue by sculptor Augustus Saint-Gaudens, representing the goddess Diana. Once a major artistic feature of New York City, the second version stood atop the tower of Madison Square Garden from 1893 to 1925. Since 1932, it has been in the collection of the Philadelphia Museum of Art.
Augustus Saint-Gaudens was commissioned by author Henry Brooks Adams (great grandson of John Adams and grandson of John Quincy Adams) in 1886 to create a memorial for his wife’s grave in Washington, D. C.’s Rock Creek Cemetery. Marion, a D. C. socialite and accomplished photographer, had committed suicide a year earlier. Adams did not want a likeness of his wife, but instead asked Saint-Gaudens to create a spiritual figure that encompassed Buddhist philosophy and was similar to characters from Michelangelo’s Sistine Chapel. Both male and female models were used to create the androgynous figure.
Saint-Gaudens finished the project in 1891 and called it The Mystery of the Hereafter. Adams referred to it as The Peace of God. The public and press nicknamed it Grief, a name Adams did not like.