Who built The Ajanta caves?

The Ajanta Caves in Aurangabad district of Maharashtra, India are 30 rock-cut cave monuments which date from the 2nd century BCE to the 600 CE. The caves include paintings and sculptures considered to be masterpieces of Buddhist religious art (which depict the Jataka tales) as well as frescos which are reminiscent of the Sigiriya paintings in Sri Lanka. The caves were built in two phases starting around 2nd century BCE, with the second group of caves built around 600 CE. It is a protected monument under the Archaeological Survey of India.
Since 1983, the Ajanta Caves have been a UNESCO World Heritage Site. The caves are located in the Indian state of Maharashtra, near Jalgaon, just outside the village of Ajinṭhā (20°31′56″N 75°44′44″E). Caves are only about 59 kilometers from Jalgaon Railway station (on Delhi - Mumbai, Rail line of the Central railways, India); and 104 kilometers from Aurangabad.