In my neolithic high fantasy the Knights of the Sun are a religious order of warriors. The order have grown rich and influential by acting as a bank. They also play a key part in protecting caravans and trade routes.
Designing the armours was fun and challenging. They needed to be sophisticated neolithic armours, but allowing for protection against the elements and movement during month-long patrols. The key to the armour is the weaved meshes, allowing the armour to be both stretchable and resilient. The plate and bone in their armours come from the mount they ride into battle.