A typical kind of house found in the east of the Netherlands, where old buildings -like barns- are renovated and transformed into beautiful homes with a thatched roof.
Quite common as well are the roof top signs/decorations (called 'geveltoptekens' in Dutch). Sometimes it's an art expression, however they often refer to Christian symbolism. I'm not really sure about the origin of this one though..
Another name for the triangular part together with the roof top decoration is (in Dutch) 'uilenbord', lit. 'owl board'. The triangular part used to have a round opening for ventilation, and owls could fly in and out as well -helping to keep the barn free from mice.
(thanks s.c !)