Something you just don't see every day

To make a long story short, every Sunday a group of people meet at the park next to my apartment. They do this.
Yes, they are knights in full suits of homemade armor. I came to find out that these individuals are part of a world-wide group who are dedicated to preserving history by living it. There are many facets to this renaissance group, covering every area of middle-age life and culture.
These happen to be knights.