This is the heaviest building in the world:
It is the Palace of the Parliament in Romania.
It is 84 meters high and weighs 4,098,500,000 kg, as it was mainly built using steel, marble and concrete construction.
In 1977, a severe earthquake occurred, which prompted the then leader, Nicolae Ceaușescu, to build this building, taking his cues from North Korean architecture.
The construction employed 700 architects and 20,000 workers for three years.
The construction consumed an enormous amount of resources, caused much suffering, and razed the homes of many residents, displacing their inhabitants.
Just two years after its completion, communism failed and the palace was looted by angry mobs.
The building cost 3 billion euros to construct, making it the most expensive administrative building in the world. And, as is so often the case, only about 30% of the building is actually used today.