for those who don´t speak Czech, there started a new special historical event of first flight, that landed at PRG airport, it was on 5.4.1937 and the plane was DC-2 of ČSL (Czechoslovak air company - Československé letecké společnosti (now known as ČSA - Czech airlines)) first route was from Piešťany (Slovakia) - Zlín (Czech republic) - Brno to Prague (PRG airport). As a celebration event you can now find some historical planes at Old PRG terminal (near terminal 3). If you touch one of the DC-2 she will depart. So PRG airport has now 2 runways in use.
Hey, i dont know if the event is still there but i can tell you i barely got it anyway. As someone said earlyer it really does take a bunch of time ti see it. When playing PRG just check on the original terminal from time to time and you might see it. Also this is unconfirmed but both of the times i caught the event plane it happened at night, so take that into account