Arendelle Chapel is where Elsa was officially crowned queen of Arendelle.
Location
The chapel is within the castle walls. It is near the courtyard and to the left when entering, thus making the cathedral near the south side of the castle.
Role in Frozen
In the cathedral, the Bishop of Arendelle places the crown on Elsa's head as Anna watches the coronation. He then presents the scepter and orb on a pillow. As Elsa moves to pick them up, the bishop reminds her that she has to remove the gloves she always wears. Elsa then faces the people in the pews and he formally speaks in Old Norse, ordaining Elsa as Queen. He barely finishes before Elsa hastily replaces the scepter and orb, shoving on the gloves. She turns again towards the people who are standing and applauding in honor of the new Queen.
Architecture
The Norwegian village of Balestrand provided inspiration for this chapel. The chapel is based on the "dragonstil" style of architecture and Norwegian stave churches. It is about 8 people high with 11 pews on each side. There are 14 posts and many windows along its side.