15 Union Square West

15 Union Square West is a historic residential building in Manhattan, originally serving as Tiffany & Company's headquarters in the 19th century. Designed by John Kellum and opened in 1870, it featured grand cast-iron arches and was once known as the 'palace of jewels.' After various ownership changes and renovations, it was transformed into luxury apartments in 2008, blending its rich history with modern architecture. Notable residents include tennis star Caroline Wozniacki, who purchased two apartments for $9 million. The building's unique design and historical significance make it an interesting site for tourists and researchers alike.