 Complete the following phrase:  Occupying the northern side of the square and still dominating its environment is the House of Knights Riddarhuset, a Swedish equivalent to the British House of Lords. While the building was begun by the French-born architect Simon de la Vallée in 1641 a year before his dramatic death, the façade is largely the work of the Dutch architect Justus Vingboons 16201698 in 1652-1656, and the original roof the design of the son of the former Jean de la Vallée 16201696 in 1656-1674, the entire composition completed by Carl Fredrik Adelcrantz 17161796 in 1762. The entire composition reflects the decreasing influence of Swedish nobility during the transition from the era of Swedish Empire to the 