The Square Kilometre Array (SKA) is an ambitious project to build the world’s largest radio telescope to revolutionize our understanding of the Universe and the laws of fundamental physics. Geographically distributed between three host countries, and with more than a dozen member nations, the SKA is composed of two radio telescopes (SKA1-LOW and SKA1-MID) and a Headquarters facility. The SKA is now moving toward the start of the procurement phase and construction activities and is about to become a reality on the ground. Here, we focus on the SKA1-LOW and present the architectural highlights of what will be the most sensitive aperture array telescope on the earth, operating between 50 and 350 MHz.