The lotus is a common Buddhist symbol and can be found literally in any places associated with Buddhism.  According to tradition, when the baby Siddhartha was born, he took seven steps immediately and a lotus flower bloomed at the spot of each step.

The Buddha had used the lotus as a metaphor to describe the enlightened being emerging from samsara like the beautiful lotus growing out of the mud.

It is clear that the manner in which the lotus grows is the main reason for the reverence in which it is held. It begins in the mud, where its rhizome is buried; then the petiole makes its way up through murky water toward the surface; once it has reached the air, high above the water in clear light, an unsullied blossom opens among the leaves that themselves are untouched by the water. What better image for the journey of the soul, born in ignorance and mired in the material world, seeking enlightenment on its passage though life; what better display of tranquillity than the great green leaves lying quietly on the water with the splendid blossom glowing in the air above them?   

--  Excerpt from https://tricycle.org/magazine/the-lotus/

The lotus is often depicted as a seat or throne on which the Buddha and Bodhisattvas sit. The meditative posture in which both legs are crossed and each foot is placed on the opposite thigh is also known as the lotus position. The Lotus Sutra is one of the most important texts in Mahayana Buddhism.

Source:

https://www.lionsroar.com/what-is-the-lotus/

https://www.buddhanet.net/e-learning/history/b_lotus.htm

MORE ARTICLES: Mudras – Bhumisparsha