Here we have the Tower of London - the oldest of the Royal Armouries, mention of the keeping of armaments there first being made in the fourteenth century. .
Today it is the showcase of them all, though it is not purpose built like Leeds, nor even as spacious as Fort Nelson near Portsmouth. It does, however, have the lineage, and it is in Central London, which most sightseers tend to base themselves in or near.
This card does actually show the White Tower, except it is a pinky red colour. Now if we were unkind, we could say that it was artistic license, or perhaps that the printers had never seen it - but actually it was not always white, it was only painted, in whitewash, by Henry III, in 1240, and we know that he was so houseproud of his idea that the guttering system was altered so that no rain could fall upon the walls and damage or stain them.
The tower was actually ordered by William the Conqueror, and building began in 1078, but in this time it would have been made of timber, and the walls would have been sharpened sticks driven into the ground. Within a decade the buildings were fortified by remaking them of stone. The tower, the central building, was originally a keep, the strongest part of the construction, into which the King would retreat whilst his men tried their best to stop the enemy coming over the moat and scaling the battlements above, before dashing across the ground and starting to scale the tower. It was therefore almost a self contained city, with living accommodation, and a chapel, and storage rooms for food and necessities, as well as, from the twelfth century, a prison for any enemies, or for British Kings that fell from favour, who were buried down into the ground to make rescue nigh impossible.
Now for the second day this is probably not the back you were expecting to see, because this set was also issued by Guerin-Boutron.
However this back is very important, as it actually advertises the cards that Felix Potin is best known for - the black and white photographs, entitled "Photographies de Celebrites", which, this card informs us were issued in 500 gram packets of chocolate and their "Timbres pour Collections", which came in the 250 gram packets, and were plain cards with a stamp stuck on.
I do not know the date that these were issued, but the "Photographies de Celebrites" were issued just after the turn of the twentieth century. I have no idea as to when the stamps were issued.