The Keizer Karel College in Amstelveen (senior general secondary education (HAVO), university preparatory education (VWO and Gymnasium)) is a sister school of the Alkwin College in Uithoorn. After they had carried out the extensions of the latter to the full satisfaction of the client, LIAG was commissioned to do the extensions for Keizer Karel College. The building is a tidily designed school building with two floors and a number of inner courtyards or patios. An interesting point was that there were entrances separated by a patio. Having run out of space, the school needed to expand. After a model study, the choice was made to extend the north side of the existing building. The new wing was connected to the existing building by covering one of the patios. This joined the two entrances with an indoor 'street'. The indoor street has become the new heart of the school, containing a recreational area and the study square.