This birdhouse was designed with the vision of making a longer lasting home for birds. Current wooden birdhouses usually lasts for fiver or so years while this one will last for at least thirty or fourty years. The minimalistic design is inspired by functional style of architecture. The outer shell is made out of 1 cm thick concrete and provide protection and insulation. The door is made of pine and comes in three different colors. The door is hinged in the upper half to be able to clean out old nests. It is fastened around a tree with a nylon strap, that can be easily adjusted.