The story
Licor 43 was invented in 1946 by the siblings Diego, Angel, and Josefina Zamora, along with Emilio Restoy, Josefina's husband. The Licor 43 website states they based their recipe on the Liqvor Mirabilis (marvellous liquid), a golden, aromatic elixir produced and infused from local fruits and herbs in Carthago Nova during the 3rd century BCE. Liqvor Mirabilis was encountered by the Romans, when they conquered the region in 209 BC; despite the Romans banning its production and consumption, the Carthaginians continued producing in secret. This legend served as the inspiration for the Zamoras' invention of Licor 43.
The name of the modern-day liqueur originates from its use of 43 different ingredients; while its recipe is a secret, it is known to contain citrus and fruit juices, and to be flavoured with vanilla, among other aromatic herbs and spices. It contains 31% alcohol by volume.
From Wikipedia’s article on Licor 43, shared under CC BY-SA 4.0.4