In 2013, PSN's portfolio expanded to include the building of the former aviation equipment factory, an unmissable landmark in Prague's Modřany. The factory, known mainly under the name Mikrotechna or Microna in recent years, began operating in Modřany as early as 1935. Due to its focus on military supplies, the company, which was founded by two Czechoslovak army pilots, relocated from Vinohrady to a new building built as a bunker, which, with a height of 14 floors, meant the use of an enormous amount of concrete and iron.