Many thanks to Shawn Morrow for sharing this link.
A gentleman named Roel Renmans who lives in Belgium and apparently visits many of the European museums, created a Flickr account where he shares his high quality photographs of armour and the depictions of armour found in the museums. He has several collections of albums that focus on the various types of exhibits that are useful for learning about historical armour.
His collection entitled "loricatus loricatus" includes albums of photographs of actual armour from the twelfth through the seventeenth century.
His collection "pinxi loricatus" includes photographs of the depiction of European armour in two dimensional art, from the 12th to the 17th century.
His collection "statua loricatus" includes photographs of the depiction of European armour in three dimensional art, from the 12th to the 18th century.
His albums include not just the pictures of the armour, but also an informative caption for each picture explaining a bit about the armour and stating which museum it is in. For those interested in studying or re-creating historically accurate armour, this is quite a useful resource.
The album "loricatus loricatus" will usually have a picture of the entire set of armour from several angles and then some close ups of specific parts of the armour. The pictures are protected from being downloaded, but here are some links to specific pictures that provide a good example of the kinds of things you'll find in his albums.
ca. 1484 - 'armour for Archduke Sigismund von Tirol' (Lorenz Helmschmid), Augsburg, Kunsthistorisches Museum Wien, Austria
Back view of the armour
Just the upper body armour
Side view of the head and shoulder area
Close up of the left gauntlet
The photographer is also a professional artist and has a website where he shows some of his work, which includes a few interesting drawings of knights in armour. You might want to check it out and help support this gentlemen who has provided such a wealth of useful pictures.