The 23 line first ran in 1929 and connected Prague 4 to Prague 6. It saw many route changes and then was put out of service in 1991. It came back in 1999 and ran along part of the same route as the 22, in the most touristy areas, but was canceled again in 2008. It has made sporadic appearances since then, notably in 2012 and 2014.
From March 2017, the 23 is back and running the following route:
Zvonařka – I.P.Pavlova – Karlovo náměstí – Národní třída – Staroměstská – Malostranská – Pražský hrad (Prague Castle) – Pohořelec / Hládkov – Malovanka
So it starts on the almost un-used track at Zvonařka, currently only used by the Number 13 tram, then joins Bělehradská street where the Trams 6 and 11 run. From I.P.Pavlova it mirrors the 22 route until Národní divadlo where it turns right along the river. Then crosses the river to re-join the 22 route at Malostranská.
At Zvonařka you should pop in to Le Bouquet for a glass of wine or visit Beckett’s Irish Pub for a pint of Guinness. Jump off at I.P.Pavlova and walk down to Žitná street for dinner at Cicala. Not far from Staroměstská is Wine O’clock – another great place for a glass of wine.
Initially, the line will run four or five trams running at half hour intervals. In the summer, there will be a tram every 15 minutes.
The 23 route will only run the older Tatra T3-type tram cars – the popular red and beige models with the high steps.
In celebration of this route and the classic T3 tram, I’ve included a series of T3 tram paintings by kind permission of Czech artist Martina Krupičková: