Princes of the Spocopolypse
Summit Hall is a fortified abbey situated in the Slumber Hills that is home to the Knights of Samular.
The Knights of Samular are an order of paladins in the service of Olasa who tend to focus on the supremacy of law. They are a well respected order in the Northlands with their base of operations in the Summit Hall while also maintaining a base in First Crossing.
Formed in 152 GE after the Great Troll War, the Knights of Samular traced its roots to two brothers who became champions of the war, Samular Caradoon and Renwick Caradoon. While successfully stopping the siege of trolls through the use of the Rings of Samular and the magical siege engine known as the Kezefbane, Renwick was killed around the end of the war (though he would become an archlich). The invading trolls were eventually routed by Samular and his growing group of paladins. These knights would eventually come to be known as the Knights of Samular.
After routing the warlord Brunyundar Margaster from the keep, the knights made Thornhold as their chapterhouse. The Knights lost their headquarters thanks to the treachery of Dag Zoreth. Ever since their initial loss of the keep, the Knights of Samular have been based out of Summit Hall.
Source: Copied and edited to fit our campaign from http://forgottenrealms.wikia.com/wiki/Knights_of_Samular