Discovering phosphorus, Hennig Brand's accidental breakthrough

In 1669, alchemist Henning Brand attempted to create the Philosopher's Stone by boiling urine. Instead of gold, he discovered phosphorus, a glowing substance. Although he initially kept it a secret, Brand's process was eventually sold to other scientists. He was later credited with discovering phosphorus, marking the first known discovery of a chemical element.

What was Henning Brand trying to create in his laboratory?

Describe the process Henning Brand used to attempt to create the Philosopher's Stone.

What substance did Henning Brand actually discover?

How did Henning Brand perceive his discovery at the time?

What was the significance of Henning Brand's discovery after his death?