thechildofchristmas:bourtange:neato: a 13th-century number notation system created by european monks
a4visuals:lady-feral:fresnel149:sixpenceee:Fort Bourtange, Netherlands.This is the biggest middle fi
jennipoos:allthingsworthsharing:Fort Bourtange, Groningen, Netherlands.Built during the Eight Year W
dailyoverview: Bourtange is a star fort located in the Groningen Province of the Netherlands. It was
visitheworld: Drone view of the star-shaped village of Bourtange / Netherlands (via boreddaddy.com).
the-man-who-sold-za-warudo: fresnel149: sixpenceee: Fort Bourtange, Netherlands. This is the biggest
the-man-who-sold-za-warudo: fresnel149: sixpenceee: Fort Bourtange, Netherlands. This is the biggest
dailyoverview: Bourtange is a star fort located in the Groningen Province of the Netherlands. It was