Beats the pants off the other churches in Vienna. No other more polite way to say it. Just beautiful inside and out. See it at night if you can as well. Stephansdom was well worth seeing too, don’t get me wrong. But if I had to pick one and only one, Karlskirche would win hands down.

Beautiful church with great presence, overlooking a fabulous crafty Christmas market (in December). Don’t hesitate to spend the minimal fee to go in, it’s worth it for the ornamentation, the ambiance, the organ balcony and the views from the panoramic observation deck. My favourite church in Vienna.

Well worth a visit. Easily accessible from Karlsplatz: a central transportation hub. Entry is cash only though. If you fancy a climb up the stone spiral staircase you can get to the organ overlooking the church. Next level is a display of clerical vestments as well as a model of the church. Then climb to the top for a panoramic view of Vienna and the belfry. I went up at midday and enjoyed the pealing of the noon bells.

This is a great baroque church situated just outside 'the ring' but very easily accessible via the city's excellent tram and bus system. It can be visited by paying an admission charge but we attended a Sunday mass service and there is no charge to enter. The church's interior is well worth viewing and there is access to internal and external viewing balconies for those who buy a ticket.

My twin brother Stephen and I were in Vienna for the run up to Christmas and we visited all of the many Christmas markets endemic throughout the city over the festive period ,one we loved was Karlsplatz Christmas Market ,lots of beautifully decorated stalls and very popular ,great setting in the park with the magnificent Karlskirche as a stunning backdrop. Karlskirche ( Rektoratskirche St Karl Borromaus ) is a beautiful Baroque church and is one of the best examples of Baroque architecture in the city ,constructed between 1716-1737 and dedicated to Saint Charles Borromeo,the most outstanding feature of this church is the magnificent dome ,looks amazing ,it's such a photogenic church and adds to the joy of visiting Karlsplatz. Well worth seeking out if you're planning a holiday to Vienna.

We love visiting churches and Karlskirche looked very intriguing from the outside, with its huge dome and the two massive columns (patterned after Trajan's Column in Rome. But, we were more than turned off by the ridiculous 9.50 euros charge to enter and the rude "guard" at the entrance enforcing he collection of fees. Really a turn-off when churches feel compelled to charge people to enter a house of worship. As if the Catholic Church is hard up for money!

Saw this as part of part of the Vivaldi Classical music concert. The church really emphasised the music and was a great venue. Wouldn't pay to just see the church alone though as not really my thing.

We went to 2 concerts during our recent visit to Vienna. One of them was at Karlskirche (St. Charles' Church), a beautiful baroque church, and it's beautiful both inside and out. There is a standard concert played here about 3 times a week, featuring Vivaldi's 4 seasons, and usually another unrelated work or 2. Even though this is a tourist-oriented concert, run on a regular basis, the concert was absolutely fantastic. The first violinist was exceptional. I did my best to identify him, but I couldn't find his name anywhere. All in all - a beautiful venue, and a fantastic concert!

This is a hidden gem and definitely needs to be seen to be believed. Weirdly it doesn’t seem to have much love locally! The place inside is insanely beautiful. The exterior is like Taj Mahal with the pond and reflection (but then they drained it when I was there for a film festival!) We saw Vivaldi opera here. Vivaldi may be buried in the grounds but (again) no mention or monument. This place is amazing but no one seems to be that fussed! Opera was superb and so atmospheric too!

It is one of the symbols of the city. Karlskirche is an example of Austrian Baroque. The building was built in 1737. The construction was started by the architect Johann Bernhard Fischer von Erlach, and completed by his son Joseph Emmanuel Fischer von Erlach.