Mostostal is a Polish

Poland

Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 steel construction group of companies. The company fabricates and builds a wide range of industrial structures from chemical plants to radio masts.

The company was formed in 1945 in Kraków

Kraków

Kraków also Krakow, or Cracow , is the second largest and one of the oldest cities in Poland. Situated on the Vistula River in the Lesser Poland region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life...

, but a short time after moved its headquarters to Zabrze

Zabrze

Zabrze is a city in Silesia in southern Poland, near Katowice. The west district of the Upper Silesian Metropolitan Union is a metropolis with a population of around 2 million...

, then to Warsaw

Warsaw

Warsaw is the capital and largest city of Poland. It is located on the Vistula River, roughly from the Baltic Sea and from the Carpathian Mountains. Its population in 2010 was estimated at 1,716,855 residents with a greater metropolitan area of 2,631,902 residents, making Warsaw the 10th most...

. It is now part of one of the largest industrial conglomerate

Conglomerate (company)

A conglomerate is a combination of two or more corporations engaged in entirely different businesses that fall under one corporate structure , usually involving a parent company and several subsidiaries. Often, a conglomerate is a multi-industry company...

s in Poland.

In the 1970s, the company built the radio mast in Konstantynów, which was the tallest structure on Earth until its collapse in 1991.