Azim Gheychisaz made history, becoming the first Iranian who has climbed the all 14 of the world’s highest peaks.

Gheychisaz climbed the peak of Mount Lhotse on Friday.

The eight-thousanders are the 14 independent mountains on Earth that are more than 8,000 meters (26,247 ft) high above sea level. All eight-thousanders are located in the Himalayan and Karakoram mountain ranges in Asia. Their summits are in the death zone.

Gheychisaz, 37, has done all of those ascents without supplementary oxygen, without Hi-porters.

Only 36 other climbers in the world have documented their climbs to all 14 of the world’s highest peaks. The first mountaineer to make such an achievement was Reinhold Messner, in 1986.

Furthermore, four other Iranian summiteers Mahmoud Hashemi, Iraj Maani, Hossein Moghaddam and Saeid Mirzaei climbed Mount Lhotse.

8,000 Meter Peaks (by elevation)

Mount Everest, 8,850 m

K2, 8,612 m

Kangchenjunga, 8,586 m

Lhotse, 8,501 m

Makalu, 8,462 m

Cho Oyu, 8,201 m

Dhaulagiri 8,167 m

Manaslu, 8,156 m

Naga Parbet, 8,125 m

Annapurna, 8,091 m

Gasherbrum 1 (G1), 8,068 m

Broad Peak, 8,047 m

Gasherbrum 2 (G2), 8,035 m

Shishapangma, 8,013 m