Pertamina, Indonesia’s state-owned oil company has started construction of what will become the country’s largest building.

Topping out at 99-stories, or 530 meters (1739ft) tall, the Pertamina Energy Towers has been designed by American architecture firm Skidmore, Owings & Merrill (SOM) and resides on a 5.7 hectares. Aside from its massive tower the Pertamina development will also be home to a 5,000 person mosque, a performing arts center, parade grounds and its very own sunken garden.

But beyond its various buildings and its and gently tapered solar shaded façade the Pertamina Tower is turning heads for its efficiency and green design. Central to the headquarters efficiency is its integrated “wind funnel” that will generate energy on the back of prevailing wind currents.

"Pertamina Energy Tower's iconic presence will stand as a model of sustainability and efficiency, as well as collaborative workplace design," said SOM director Scott Duncan. "The headquarters' performance-driven design supports and reflects the ambition of Pertamina's mission and forges an innovative model of green development in Jakarta."

Currently, the tower is slated to be completed by 2020, once fully outfitted the building will accommodate an incredible 20,000 Pertamina employees.

Images Courtesy of SOM