Final answer:
The patron of the Step Pyramid at Saqqara was Pharaoh Djoser, and the architect was Imhotep, who designed the first stone-built Egyptian pyramid.
Step-by-step explanation:
The patron of the Step Pyramid at Saqqara was Pharaoh Djoser, who reigned during the 3rd dynasty of Egypt's Old Kingdom, and the pyramid is part of his tomb complex. The renowned architect who designed this step pyramid was Imhotep. He is credited with the innovation of stacking stone mastabas to create a towering structure, and his design transformed Egyptian monumental architecture.
Constructed around 2675-2625 BCE, this pyramid marked an important evolution from previous tombs that were made of mud bricks, as it utilized stone and featured a complex system of underground chambers designed to protect the tomb from grave robbers. Imhotep was later deified by the Egyptians, a testament to his architectural achievement and influence.