D27 is known as the Great Hunebed, and is the largest single hunebed in the Netherlands. The Groningen poetess Titia Brongersma conducted the first serious hunebed excavation here in 1685, finding a wealth of pottery, tools and other artifacts. Since the hunebedden have been sealed in recent decades to prevent looting, extensive scanning is now being used to investigate this important site further. The two remaining ringstones are speculative; traces of the rest were still visible in 1835, but have since been carried off.