Archaeologists who unearthed the remains of a 3,500-year-old pyramid-shaped mausoleum in the Kazakh steppes, have now opened its funerary chamber, finding a skull, human bones and Bronze Age pottery objects.

Wrongly hailed by several media outlets as the world's first pyramid, the structure dates back to the 14th to 12th century B.C. and contains five walls that gradually rise toward the center.

The structure appears to resemble the step pyramid of Djoser, which was built about 4,700 years ago at the site of Saqqara in Egypt.

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Considered the first Egyptian pyramid, the Djoser monument originally stood 203 feet tall, with a base of 358 by 410 feet.

By contrast, the Kazakhstan "pyramid" was much smaller. Made from stone, earth and slabs in the outer side, it measured about 6.6 feet high and about 49 by 46 feet long.

"It was built by the Begazy-Dandybay culture of Late Bronze Age in Kazakhstan," Viktor Novozhenov, an archaeologist with the Saryarka Archaeological Institute at Karaganda State University in Kazakhstan, told Discovery News.

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