Vienna boys' chior at the Chapel
 

I read somewhere here that there are Vienna boys' free chior performances at the Chapel of the Imperial Palace in Hofburg on Sundays.But I can't find on the internet when approximately that would be. I would greatly appreciate it if you can pass the information to me if you happen to know it.

They sing (heard but not seen) at Mass in the Imperial Chapel (Hofburgkapelle) of Hofburg 9:15 - 10:30 on Sundays, exc. July/Aug.

Seats ($5-29Euro) must be reserved 2 mos. in advance (from US, fax 011-431-533-992-775 or email [email protected]) SRO is free and open to first 60 who line up. You can also avoid the line and just stand in the narthex just outside, where you can hear the boys and see the Mass on a TV monitor.

The can be seen, a little.
The choir stalls are at the very top of the chapel. For those of us sitting up in the nosebleed seats, you can actually see them due to some installed mirrors. For those sitting at ground level (as some of my family was), the choir does come downstairs near the end, for just a few minutes.
They are not on display, as it were, because the effect is supposed to be voices coming from heaven.

here are two websites

www.musikverein.at or www.mondial.at

Thank you DeeDee and Elaine for the information!

I recall reading somewhere that there are actually 4 Vienna Boy`s Choirs. When a couple of them are traveling, others are in Vienna so your chances to see them are increased.