In fact, there is no evidence that Buddhism was a state religion under Ashoka. None of Ashoka's extant edicts record his direct donations to the Buddhists. One inscription records donations by his queen Karuvaki, while the emperor is known to have donated the Barabar Caves to the Ajivikas. There are some indirect references to his donations to Buddhists. For example, the Nigalisagar Pillar inscription records his enlargement of the Konakamana stupa. Similarly, the Lumbini (Rumminidei) inscription states that he exempted the village of Buddha's birth from the land tax, and reduced the revenue tax to one-eighth.