Caption: "One of Luigi Mayer's (1755-1803) most famous drawings, this shows the beginning of the Grand Gallery of the pyramids of Khufu which leads up to the burial chamber. At the bottom is the entrance to corridor leading to the so called Queen's chamber." The Great Pyramid of Giza (also known as the Pyramid of Khufu or the Pyramid of Cheops) is the oldest and largest of the three pyramids in the Giza Necropolis bordering what is now El Giza, Egypt. It is the oldest of the Seven Wonders of the Ancient World, and the only one to remain largely intact. Providing access to the royal burial chambers, is a passage known as the Grand Gallery. When explorers discovered the Grand Gallery, they stepped into a steeply slanted passage less than 7 feet wide but more than 153 feet long and nearly 29 feet high. The walls were lined with massive granite blocks form the Aswan quarry. The Grand Gallery connects two passages leading to chambers dubbed the Queen's Chamber and the King's Chamber.