Licor beirão, commonly simply known as beirão, is a portuguese liqueur from the beira region of portugal. originating in the 19th century, it is the most consumed alcoholic spirit in portugal.production began in the 19th century in lousã, in the beira region, from where it got its name (beirão means "from beira"). it is made from a double distillation of seeds and herbs, including mint, cinnamon, cardamom and lavender, from all over the world, including former portuguese colonies of brazil, sri lanka, and india.

Source: Wikipedia