Indiana Limestone Company is unmatched as the premier supplier of Indiana Limestone in a range of beautiful and lasting building products. Founded in 1926 (with predecessor firms that had been quarrying limestone since the mid-1800s), ILCO today remains the provider of choice for this internationally renowned natural stone. Throughout an illustrious history in which its stone has made such iconic structures as the Empire State building, National Cathedral, and the Pentagon, ILCO has reliably provided the highest quality products and services carefully tailored to the needs of the market with an environmental, natural focus.