Its basilica church is often cited as one of the most beautiful buildings in the area.

[3][4] Sonntagberg lies in the Mostviertel in Lower Austria.

It has a baroque church that was, in its current form, built in 1706–1732 by Jakob Prandtauer and Joseph Munggenast.

In 1964, Pope Paul VI gave it the title Basilica minor.

For a short while, Sonntagberg was the location of what would then become Summerhill School.