The tomb complex contains three graves of kings and several graves of relatives. The first king and the second king had not embraced the divine religion but still followed the local beliefs called Parmalim. The third king, named Solompoan Sidabutar, had embraced Christianity. He was among the earlier Batak leaders who adopted the new religion and helped shaped the modern Batak culture. He was also one of the most powerful kings as he possessed supernatural powers. According to the legend, he never cut his hair to remain supernaturally powerful.