Which material was used to build the Great Mosque of Djenné in Mali?

I saw a tv programme about this a few years ago. It was very uplifting that the whole community got together to do something positive

I have learn about it for the first. time

worlds largest sand castle

So fascinating!! Quite an architectural feat to build something like this. Additionally the fact that the whole community comes together to care for this building is very heart-warming. Great Question

Joseph , Timbuktu as the answer to what?

i was expecting Timbuktu as the answer. I now see that they are not the and place, although both in Mali.