[citation needed] The decoration of the interior involved artists from various parts of Europe including Giovanni Battista Carlone who created the stucco works and Jakob Steinfels from Prague who painted the frescos.
The church contains ten reliquaries of richly dressed and bejewelled skeletons, the largest such display in Europe.
[2] The skeletons were removed from the catacombs of Rome and were ornamented by Adalbart Eder, a Cistercian lay brother and skilled goldsmith, in the 18th century.
[2] It was believed at the time that clairvoyant priests could, through prayer, determine the identities of these skeletal remains.
[3] On 4 and 5 April 1990, Unitel visited the basilica to film Leonard Bernstein conducting three pieces of sacred music by Mozart - his Great Mass in C minor, his Exsultate, jubilate and his Ave verum corpus.