4. The Johnston Mausoleum is the Largest Personal Mausoleum in Calvary Cemetery
Built and occupied by the Johnston brothers in the 19th century, The Johnston Mausoleum is the largest personal mausoleum (and the third-tallest building) in the cemetery, costing over $100,000 to construct at the time (or roughly $2.5 million when adjusted for inflation). Thirty vaults are built into the marble, although only six interments took place.
The brothers operated J.C. Johnston silks and fabrics store on 22nd Street between Broadway and 5th Avenue, which was largely successful at the time. The mausoleum, however, was built before the last of the Johnston brothers squandered the family fortune and passed away in a barn.