The package contains PSD and PNG files of one template for 1920x1080 screenshots and one for 512x512 workshop thumbnails as well as a SFM render scene for workshop thumbnails.
Ye Olde Workshoppe is a community initiative about creating medieval themed content for a community update. You can find out more about it at http://medieval.tf2maps.net/.
Medieval Workshop Resources A1 (Reupload)
Image and SFM rendering templates for medieval themed items