Under Anton’s leadership, Wm H. Müller & Co. grows into a highly profitable, international company in ore and shipping. For that reason, in 1900 he decides to move the company’s headquarters to The Hague, where he can develop a lucrative network of politicians and diplomats. He purchases two villas on the waterfront in the Van Stolkpark, on the edge of Scheveningen. The Hague society architect Leo Falkenburg is commissioned to renovate the offices at Lange Voorhout No. 3 and both the residences. One villa is converted into a coach house with stables and staff quarters, while the elegant neoclassical Huize ten Vijver is built on the foundations of the other. There, the Kröllers take up residence.