Wroat Temple

Wroat is arguably the power-house of the Order of Light, as the Council of Taratâi is based there, and so is the ruler and parliament of Breland.
However, Sharn Temple is the biggest, and much of actual Breland's ruling happens from there, so a corresponding power for the temple occurs.
What cannot be argued is the beautiful design of the temple. It sits in magnificent grounds, has an elegant and regal look, and is actually much bigger inside than it looks.
It is the oldest of the Temples, founded in 835 YK.

Wroat Temple (Daytime)

Wroat Temple (at Night)