Cave 4, a Vihara, was sponsored by Mathura, likely not a noble or courtly official, rather a wealthy devotee. This is the largest vihara in the inaugural group, which suggests he had immense wealth and influence without being a state official. It is placed at a significantly higher level, possibly because the artists realized that the rock quality at the lower and same level of other caves was poor and they had a better chance of a major vihara at an upper location. Another likely possibility is that the planners wanted to carve into the rock another large cistern to the left courtside for more residents, mirroring the right, a plan implied by the height of the forward cells on the left side.