Armour Documentation Resourses
ManuscriptMiniatures.com is an image collection of miniatures depicting armoured figures from the medieval period. Miniatures are sourced from manuscripts created before 1450 in countries across Europe.
A study of Effigies searchable by user defined criteria
Effigies and Beasses is a site that has compiled detailed pictures from funerary effigies from European countries spanning hundreds of yeatrs. You can do searches based on country, dates, gender and a variety of other criteria.
When you want to start a new harness that will need documentation, this is a great resource to check in with first.
There are a number of great sites that are helpful when documenting your armour