Chambord is the largest chateau in the Loire valley. The king of France - Francis 1- ordered the chateau to be built in 1519, and its construction lasted over 30 years.
Also, as the castle was not surrounded by a village or estate, there was no immediate source of food other than game. This meant that all food had to be brought with the group, typically numbering up to 2000 people at a time.
As a result the castle was completely unfurnished during this period. All furniture, wall coverings, eating implements and so forth were brought specifically for each hunting trip.
You need a good few hours to properly explore Chambord, not just the chateau (which is huge) but also the grounds. It is also possible to hire a boat but we didn't have time to do that or even to explore the forest, in spite of spending about 4 or 5 hours there.
And this is the double spiral staircase, like a DNA helix, said to have been designed by Leonardo da Vinci. We went up a staircase each and met on the next floor up. I think it was probably designed for traffic in two directions, and was no doubt necessary if there were 2000 people walking between the floors in different directions. Although maybe it was just a design thing.
I find it incredible that this Chambord chateau was built as just a hunting lodge to be used occasionally. Chambord has 77 staircases, 282 fireplaces and 426 rooms.
After Francis I death in 1574 the castle was practically unused for about fifty years. A couple of centuries later, after the French Revolution, there were plans to demolish it. Fortunately, the castle was saved. Since the 1930's the French State has taken care of restoring and preserving it.
The estate covers 5440 hectares surrounded by a wall and is the largest enclosed forest park in Europe. It is also a national game reserve containing many types of animals living completely wild, including wild boar and deer.
At the bus terminal in the grounds of the castle, which we had trouble locating, we met the Brazilian guy who was also staying at the same hostel in Blois. He had walked from the hostel that morning (took 1 hr 30 mins) to get into Blois town as he had missed the only bus on a Sunday, and was planning on seeing another chateau before returning, which meant also missing the last bus back to the hostel. Luckily he managed to hitch a lift on his return.
To get here by tourist bus (next to Blois station) the earliest bus you can take is about 11.15am and the last one back is about 4pm. The bus does a circuit of 3 chateaux for the same fare, so you need to retain your ticket if you are going on to the other ones and to get back to Blois.
I was due to go back to London the next day, but was glad I saw at least one chateau and didn't have the energy to finish the circuit anyway.