 In this, Rosenbaum's biographer Karin Hallas-Murula traces influences both from the lively Art Nouveau scene in Riga and architects such as Mikhail Eisenstein and the highly influential Viennese architect Otto Wagner.In the same baroque-influenced style as the house on Roosikrantsi, but this time also incorporating rococo elements, is Laupa manor house in central Estonia, built in 1910–1913 and designed by Rosenbaum.It is a symmetrical composition, and – typical for Rosenbaum – with a richly decorated façade.