 The Tönnies sons continued their father’s legacy and built the court palace; a town hall; a gymnasium; Maldika; the Catholic printing house (today the Faculty of Law); Jakopič’s pavilion in Tivoli; the Yugoslav Credit Bank (now the Bank of Slovenia); the main railway station in Ljubljana and many other buildings in Ljubljana.In addition to the construction work of Tönnies, they also had important achievements in mechanical engineering.The machinery developed included that what was used in forestry industry; wood processing; pumps and turbines; belt presses and the instruments for measuring earthquakes.