Longmen caves are a collection of caves filled with giant

Longmen caves, or Longmen Grottoes, are a collection of caves filled with giant and accurately built depictions of Buddhist subjects, near Luoyang in the Henan province, China. The caves were founded in 493 AD and had for 500 years been filled with Buddhist images and carvings donated by wealthy members of the imperial family, religious  groups and generals, in the hopes that their carvings would bring them good fortune. The Longmen caves were declared a World Heritage Site in the year 2000 because of their artistic and cultural relevance.

The Yaofang Grotto, which depicts medicinal cures, is in the northern part of Longmen Mountain. It was begun in the late Northern Wei period and was finished during the Tang-dynasty period of Empress Wu Zetian, so construction lasted around two hundred years. This is the only relatively large cave at Longmen that has Northern Qi statues. Some 140 different kinds of medicines and treatments of various illnesses are carved on either side of the cave entryway, which are very important research material for study of China's ancient pharmacopeia.
Work began on the Longmen Grottoes in 493, when Emperor Xiaowen of the Northern Wei dynasty moved his capital to Luoyang. Over the next four centuries this work continued; it can be divided into four distinct phases. The period between 493 and 534 was the first phase of intensive cutting of grottoes: the first cave to be carved was Guyangdong (also known as the Shiku Temple). This phase of intense activity was followed by a period between 524 and 626 when very few caves, and those all relatively small, were cut. This is attributable principally to the civil strife between different regions of China that persisted throughout the Sui dynasty (581-618) and the early part of the Tang dynasty (618-907).