The seal guaranteeing Food from Madrid is inspired by the eighteenth century, the Enlightenment. During his reign, Charles III promoted major changes not only in the city but also in the Madrid countryside. In the city of Madrid, he created the 9-tile grid street naming system which is still in use today.
The letter M comes from an ancient Egyptian hieroglyph that symbolises a wave of water. Madrid receives its Arabic name "mayrit" because of the underground water canals. These Arab channels would be used by Charles III for sanitation and sewerage.
For the rendering of the letter M over the 9-tile grid, a typeface used by Joaquín Ibarra y Marín, royal printer for Charles III who initiated the work on a new edition of The Ingenious Hidalgo Don Quixote in 1773, has been chosen. This typeface is now known as Ibarra Real.