It is possible to visit this church dayly.

no l'ingresso é gratuito

Some tourists go to churches, temples, mosques, etc., because they are famous, historic, and pretty. They take pictures, gawk, and tick another landmark off their list. Others are art and music lovers who want to appreciate great works in the venue for which they were created. Most are respectful. The ones we notice are those who are not: people who talk too loud, take flash photos (especially of worshipers praying as they light candles,) touch the artwork, and so on. In this very church, someone stole my program when I went to take Communion. It was just a single photocopied sheet, but I had wanted to keep it. The lady who was sitting next to me was so horrified at this (near as I could tell, as I speak no German), she told me exactly what she thought of this horrible person, and she insisted I accept her husband's program -- they only needed one as a keepsake. Tourists need to remember that these are more than museums -- they are real, working, living houses of worship. Myself, I always put a few coins in the collection plate. I buy a CD. I say a prayer and light a candle. In Jewish sites, I say a prayer and leave a stone. Mostly, however, I write about my experiences. My two visits to this church were glorious. I love cathedrals, and have spent many happy hours exploring them. I hope my musings and (often strong) opinions at least occasionally assist a fellow traveler.

Coming from the Opera and heading toward the Hofburg Palace, the church is on the left side of the street. The entrance is on the end closest to the main part of the Hofburg. So, coming from the Opera, you would pass the entire length of the church (there are concert posters on this wall every few feet). When you get to the end (and a courtyard), do a U turn to your left, and that's the entry. Go as early as you can. I got there more than an hour before the service, and not only was I able to explore the church and snag a prime seat, the orchestra was rehearsing. What a treat!