Archeologist Agus Aris Munandar proposed a hypothesis, that the move was caused by a religious motives. He mentions that the incessant eruptions of Mount Merapi has caused the kingdom to move. Pointing out that in ancient Javanese beliefs, Merapi was considered as the Mahameru for the people in the ancient Mataram. According to Hindu teachings, the Mahameru peak symbolises the centre of the universe, the sacred realm where the gods live. Since their Mahameru in Central Java continued to erupt, they decided to move, but they still looked for another Mahameru. As East Java was still part of Mataram territory, it is possible that some of the people informed the Central Java kingdom that there was another Mahameru in the east. He suggests that the new sacred mountain was Mount Penanggungan in East Java, which resembles Mahameru.