During which century did the practice of putting signs on buildings and buisinesses begin?

The practice of putting signs on buildings and businesses began in the 14th century.

The practice of putting signs on buildings and businesses, known as signage, began in various civilizations throughout history. However, the extensive use of signage became more common during the 19th century. This period marked the industrial revolution and urbanization, leading to a proliferation of businesses and the need for effective advertising and identification. The use of signs continued to evolve in the 20th and 21st centuries, with advancements in technology and the development of various sign types for different purposes.