As I travelled toward Siena (the city) I wondered whether I would see sienna (the color). Very much so! The entire city was sienna. Every building was apparently made from the clay.

My reaction exactly when I traveled there. Amazing how
a word influences what you look for.

Amazing how a word influences what you look for.

But the color, sienna, comes from the term terra di Siena (earth of Sienna). It's not a controversial etymology, is it?

Unless I misunderstand you, I only meant that
when I visited the city, I was expecting to see
the color, and I did.

google SIENNA and 99.9% images are of Sienna Miller LOL

so I added the word colour to my search and that got a better result.

 

The process to create burnt sienna, is to take raw sienna and heat to remove the water from the clay, this gives it a warm reddish-brown colour.

I only meant that when I visited the city, I was expecting to see the color, and I did.

I just don't understand. Maybe it's just me who's confused. It's kind of like saying I went to San Francisco, and I saw the Golden Gate Bridge. Some day I hope to get to Siena, but then it'll be for the Palio di Siena (link).

Sienna is a remarkable color much more pleasant than ochre. I once worked as a scene painter and was amazed that by adding a little cerulean with white to the sienna the result would be a soft gray.

It's no big deal, but look the buildings in the second
picture: sienna colored. That is all I meant.
The race looks exciting.

Sure and well observed. All blue shades mixed with brown shades give grey shades in wide varieties.

I went to Siena and expected to see lots of colours ( palio) and I did. I went to the country side around Siena and I saw the raw pigments of siena earth. It's not exactly like the stones of the city. Another wonderful place for coloured earth is Rousillon in France :
link

That is a very beautiful town too. Such class, such
distinction. I wish we had towns like that.

So much more pleasing to the eye than many different colours.

Those pictures look like an artists impression of a town. Its amazing that it is just normal peoples houses.