THE GATE OF THE SUN.

At a height of 3,825m/12,549 ft, lies the ancient city of Tiahuanco, the capital of an ancient empire that was destroyed by immense cataclysms, of with the Sun Gate was one of the few constructions that survived. The nearby Puma Punka site, with its huge stone blocks also clearly fashioned by advanced technology, was another ancient site from that time period.
Tiahuanco extended into present-day Peru, Bolivia, and Chile. Considered by some the oldest city in the World, much of Tiahuanaco's creation defies the laws of physics and mathematics even by today's standards. Many monuments bear close resemblance to those created by other ancient cultures all over the planet. It is truly an overlap if one were to place hologram over hologram, to define the journey of humanity in time.
Tiahuanaco's timeline came and went, leaving behind megalithic monuments that go without explanation as to their mathematical design and construction. It is unknown how old these structures are. Some researchers suggest that Tiahuanaco dated to 15,000 BC, based on his astronomical techniques. More and more people now are accepting the fact that the Earth has had a long and complicated history, with many civilizations, some of them very advanced that came and went, leaving their testimony clearly fashioned by their advanced technology.
Andean legends claim the area around Lake Titicaca was the cradle of the first humans on Earth. Lord Viracocha, the Creator of all things, chose Tiahuanaco as the place of creation.
Tiahuanaco was once a port and it is now about 800 feet above the level of Lake Titicaca. Structures found in the Lake shows that the water level have changed dramatically throughout history.
One ruin still standing in Tiahuanaco is the Gate of the Sun. It is a megalithic solid stone approximately 3m/ 9.8ft tall and 4m/13 ft wide, and about 10 tons in weight, perfectly carved on a single block of stone with perfect level surfaces and smooth right angles. It is located near Lake Titicaca at about 3,825m/12,549 ft above sea level near La Paz, Bolivia.
The figures that decorate the stone are astronomical connotations and resemble human-like beings with wings and curled-up tails, and appear to be wearing rectangular helmets. The lintel is carved with 48 squares surrounding a central figure. Each square represent a character in the form of winged effigy. There are 32 effigies with human faces and 16 with condors' heads. All look to the central motif -the figure of a man in the centre sculpted with his head surrounded by 24 linear rays emitting from his face in all directions representing the rays of the sun. The figure is also called the "Weeping God" because things similar to tears are carved on his face. The styled staffs held by the figure symbolize thunder and lightening. Some believe that the central figure represents the Sun God, while others have linked it with the Inca Creator God Viracocha.
The Sun Gate reflects a solar calendar of the Earth in a distant time when the length of a solar year was different and it cannot be made to fit into the solar year as we divide it at present. The calendar has 290 days, divided into 12 months of 24 days each. The calendar also gives the beginning of the year, the days of the equinoxes and solstices, information on the obliquity of the ecliptic (then about 16.5 degrees; now 23.5) and on Tiahuanaco's latitude (then about 10 degrees; now 16.27), and many other astronomical and geographical references from which interesting and important data may be calculated. They also divided the circle in 264 degrees, in contrast with our present day 360 degrees.  At that time the Earth had a different solar orbit and axial tilt, and a different moon.
The Gate of the Sun is a unique depository of astronomical, mathematical, and scientific data, put down in a language that was very different from ours. The symbols had minute details and they are positioned in an overall schematics and a directional flow of reading, that would allow to compress a lot of information into a small space.
What the Sun Gate Calendar shows is that the ancients had a way to write down complex information in a compact iconographic form, in which every detail had a meaning. It is an entirely different form of communication. Their way was very structural, mathematical, and directional.
What the Sun Gate Calendar also shows is that the World of people before the catastrophes of 12,000 years ago must have been quite different. A much smaller moon would have meant that there were no or almost no tides of the oceans, seas, bays, rivers. A lesser axial tilt of the Earth would have resulted in less pronounced seasons. A quicker rotation of the Earth around the Sun, with a smaller year of 290 days, would also have had its influence on growth cycles of plants and animals and humans.