The Flatiron building, designed by Chicago's Daniel Burnham, was completed in 1902 and was one of the tallest buildings in New York City. But after over nine decades of deterioration and crumbling, missing terra-cotta stones needed to be replaced. This landmark was restored in the early 1990s, and Dean Mercado and Alberto Penna (while with MJM Studios) were responsible for site documentation, construction documentation, and the reproduction coordination/management of over 500 individual architectural ornamental stones.