Athens was filled with smoke on Sunday (October 24) as officials prepared to build a new square in the capital.
The municipality said it was the first time in more than a century that they've built a new square in the centre of the city.
The controlled explosion took place successfully, according to officials.
Surrounded by shops and hotels near Athens' busy central Omonia square, the area was closed off for several city blocks and huge barricades were set up in front of the building to control the impact from the explosion.
Huge waves of smoke filled the neighborhood after the building collapsed.
The derelict building, which was previously used by the Navy Veterans Fund, was bought by the municipality as part of the city's campaign to increase green space in the congested capital.