An extension for set number twelve (12A) includes 206 stone blocks in three standard colors; brick red, natural sand, and slate blue. The Architectural Design booklet contains plans for 10 large buildings including a customs house, elaborate villa, and a church with a steeple tower. The set is packaged in the traditional wooden box with a packing diagram. This expansion allows you to build elaborate and more complex models and improves your building experience with Anchor Stones. This set plus the combination for set #12 becomes the equivalent of set #14 and allows you to build all of set #14 models.