The 'knight king's' herma, apart from the Holy Crown and the Holy Right Hand, is Hungary's most important sacral artifact and the only faithful depiction of an Árpád Dynasty king. The masterpiece of goldsmith work can be seen in the Basilica Museum. The throne installation on the top floor of the church features a scientific reconstruction of Saint Laslo's face. The walls are ornamented by artifacts of the Hungarian cult of Saint Laslo.

The Cathedral Basilica of the Assumption of Our Lady is considered to be the main church of the Győr Diocese. It is located in the most ancient part of the city, the place where the Rába and the Danube meet, on what is known as Káptalandomb (Chapter House Hill) across from the Püspökvár (Bishop’s Castle). Apart from the Püspökvár, this is the city's oldest and most significant monument. One of Hungary's most important relics is kept here, Saint Laslo Herma. The eastward facing three-aisle basilica's classicist main facade boasts large, half-circle shaped windows, above is the tympanum with vases at its corners, behind is the tower capped with a Louis Seize style steeple. The bronze gate of the main entrance was created in 1938 by Bandi Schima, a craftsman of Győr. The north and south faces of the basilica feature red marble gates made in 1774. The cathedral was granted the rank of minor basilica in 1997 by Pope John Paul II.

The icon of the Weeping Virgin Mary, the Saint Laslo Herma and the memorial of the Beatified Vilmos Apor can be found in this early Baroque style church. Visitors can become acquainted with the history of both the Győr diocese and the city in general when viewing the exhibition at Káptalandomb and the top of Püspökvár offers a beautiful view everyone can enjoy.