Little has been seen of the kingdom so far, but there exists a large castle where the royal family resides. Directly in front of the castle is a stone path that weaves through a field of flowers.
Cavendish was born as the prince of the Bourgeois Kingdom, and even when he was a child he was admired by women. As Cavendish grew older, he got so popular that the women of the kingdom refused to get married, and he was eventually run out of the kingdom for being too popular, left with 74 underlings and 500,000,000.
"Bourgeois" is usually an adjective to describe something relating to the bourgeoisie (or ruling class).
It might also be a reference to Bourgeois tragedy, which follows Cavendish's theme of European works.