It’s a global space race to live on the moon. Around 26 nations want to figure out what that’s going to look like.
In the past, NASA has been a big fan of expandable, inflatable modules, like the ones made by Bigelow Aerospace. The ESA’s concept art shows buildings made out of the natural elements found on the lunar surface. This idea isn’t far-fetched; product designers have used sand to print in the past.