The Barnwood Builders have worked on huge pioneer barns before. But this Sunday, when season 6 premieres, audiences will watch Mark and the guys take down the largest log home they’ve ever found.

When Mark first saw the massive farmhouse in New Springfield, Ohio, he knew it was a rare find. Most old cabins are small with simple construction, a reflection of the early pioneers’ modest means. By comparison, this two-story, 26-by-32-foot farmhouse is enormous. And the design is a marvel of nineteenth-century engineering. The pioneers who built it used extra-large, hand-hewn summer beams to support the joists on the first and second floors—something Mark and the crew have never seen before in a log cabin. The crew also discovers that the logs are pegged together in an unusual way, a detail that reveals the unparalleled craftsmanship that went into building this home.