What is in this image? Describe it as if you were explaining it to someone from the 15th century.

This image depicts a scene taking place on a vast, flat pane of ice, enclosed by stone walls and under which men in curious armature engage in a spirited contest. They are equipped with elongated staves ending in curved blades, with which they vie to control a small, round disc upon the ice. The men are clad in padding akin to armor, covering their torsos, limbs, and heads, suggesting a readiness for robust physical engagement.Above them, an unfamiliar apparatus holds numbers that change, perhaps a method of tracking time or scoring, unlike the hourglasses or sundials to which thou might be accustomed. These men skate upon metal blades affixed to their boots, gliding across the ice with surprising agility, reminiscent of the movements of a dancer or a mounted knight in a joust. Their goal is to maneuver the disc into a designated area, vigorously defended by another clad in even more formidable protective gear, standing in front of a netted frame. This action, both strategic and swift, hints at a competition blending finesse, strength, and strategy.