Gregory Deyermenjian

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Gregory Deyermenjian (born 1949, Boston) is a psychologist and explorer. In 1981 he visited the ruins of Vilcabamba la Vieja at Espíritu Pampa, and then turned his attention to the northeast and north of Cusco, Peru. Since the mid-1980s he has made numerous expeditions to Peru investigating Paititi, a legendary lost city that is part of the history and legend of the western Amazon basin. He is a long-term Fellow of The Explorers Club.

He has participated in extensive explorations and documentation of Incan remains in Mameria (1984,[1] '85, '86, and '89); the first ascent of Apu Catinti (1986); the documentation of Incan "barracks" at Toporake (1989); a traverse of the Incan "Road of Stone" past the Plateau of Toporake (1993); the discovery and documentation of Incan and pre-Incan remains in Callanga (1994); the discovery and first ascent of an Incan complex at base of Callanga's peak "Llactapata" (1995); the first visit, exploration, and documentation of the true nature of Manu's Pyramids of Paratoari (1996); he led a six-man Brazilian/Italian/North American expedition to investigate Roland Stevenson's finds following the Incan "Road of Stone" onto the Plateau of Pantiacolla, discovery of "Lago de Ángel" and its Incan platforms north of Río Yavero (1999);[2] and full investigation of claims that Paititi was to be found on Río Choritiari (2000).

In June 2004 the "Quest for Paititi" exploration team of Deyermenjian and ongoing expedition partner Paulino Mamani—along with expedition partner from the 1980s, Goyo Toledo—discovered several important Incan ruins along branches of the Incan Road of Stone at the peak known as Último Punto in the northern part of the Pantiacolla region of Peru.[3]


  1. ^ Gregory Deyermenjian. "Mameria: an Incan Site Complex in the High-Altitude Jungles of Southeast Peru". Athena Review. 3 (4). 
  2. ^ Gregory Deyermenjian. "Discovery of Inca ruins at the headwaters of the Río Timpía". Athena Review. 2 (2). 
  3. ^ "Quest for Paititi". Retrieved 2008-01-17. 
  • Gregory Deyermenjian (June 1990). "The 1989 Toporake/Paititi Expedition: On the Trail of the Ultimate Refuge of the Incas". The Explorers Journal. 68 (2): 74–83. 
  • Gregory Deyermenjian (Spring 2006). "In Search of Paititi: Following the Road of Stone into an Unknown Peru". The Explorers Journal. 84 (1): 28–35. 

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