Day 16 concludes Chapter 11, Beholding the Stūpa of Treasures, and completes the Fourth Volume of the Sūtra of the Lotus Flower of the Wonderful Dharma.

Having last month heard the Buddhas of the worlds of the ten quarters announcing their plans to go to Śākyamuni Buddha of the Sahā-World, we see Śākyamuni Buddha purify two hundred billion nayuta more worlds to seat these Buddhas.

Śākyamuni Buddha again purified two hundred billion nayuta more worlds of each of the eight quarters [neighboring the expanded world] to seat all the Buddhas of his replicas. The hells, the regions of hungry spirits, the regions of animals, and the regions of asuras [of those worlds] were eliminated; and the gods and men [of those worlds] were removed to other worlds. The ground of those purified worlds became lapis lazuli. The worlds were adorned with jeweled trees five hundred yojanas tall. The trees were adorned with branches, leaves, flowers and fruits. Under the trees were lion-like seats of treasures five yojanas tall, adorned with great treasures. The great oceans, rivers, the Mucilinda Mountains, the Maha-Mucilinda Mountains, the Surrounding lron Mountains, the Great Surrounding Iron Mountains, the Sumeru Mountains, and all the other great mountains [of those worlds] were eliminated, and all those worlds were amalgamated into one Buddha-world [that is, into the world of Śākyamuni Buddha]. The jeweled ground of this [expanded] world was even. Jeweled curtains and canopies adorned with streamers were hung over this [expanded] world; the incense of great treasures, burned; and jeweled flowers of heaven, strewn over the ground.

The Introduction of the Lotus Sutra offers this on the Buddhist Ideal of a Pure World:

[In Chapter 11, Beholding the Stupa of Treasures,] the vast worlds surrounding our World of Endurance are purified three times. By placing the World of Endurance (Saha-world) in the center of those purified worlds, the Sutra shows us that the Buddhist ideal of a pure world must be realized here in our real world, and not somewhere else beyond reality.