![](https://static.dezeen.com/uploads/2016/04/a-mental-image-blavatsky-observatory-santiago-borja-rotterdam-biennale_dezeen_sqa.jpg)
Thatched observatory installed on roof of 1930s Sonneveld House in Rotterdam
Mexican artist Santiago Borja has built a thatched observatory on the roof of one of Holland's best-preserved Modernist houses (+ slideshow). More
Mexican artist Santiago Borja has built a thatched observatory on the roof of one of Holland's best-preserved Modernist houses (+ slideshow). More