What is the earliest known technical drawing?

The earliest known technical drawing is believed to be the "Vitruvian Man," created by Leonardo da vinci around 1490. However, even older examples exist, such as the ancient Egyptian drawings and plans for architectural structures, including the blueprint for the Step Pyramid of Djoser, dating back to around 2650 BCE. These early drawings served as visual representations of concepts, designs, and measurements in various fields, including architecture and engineering.