It's my 3rd Croatian postcard (I've received all of them in RRs and they were all very nice), but the 1st one showing Croatia's Capital - Zagreb. I don't know much about Croatia and about it's capital, but I've found out that it was quite an old city (more than 900 years old, just a bit younger than my city) :)
The history of Zagreb dates as far back as 1094 when the Hungarian King Ladislaus founded a diocese. Alongside the bishop's see the canonical settlement Kaptol developed north of the Cathedral, as did the fortified settlement Gradec on the neighbouring hill. Today the latter is Zagreb's Upper Town (Gornji Grad) and is one of the best preserved urban nuclei in Croatia. Both settlements came under Tatar attack in 1242. As a sign of gratitude for offering him a safe haven from the Tatar the Croatian and Hungarian King Bela IV bestowed Gradec with a Golden Bull, which offered its citizens exemption from county rule and autonomy, as well as its own judicial system. According to legend, Bela left Gradec a cannon, under the condition that it be fired every day so that it did not rust. Since 1 January 1877 the cannon is fired from the Lotrščak Tower on Grič to mark midday.