Shortly before his death he had the satisfaction of witnessing the marriage of his daughter Louise Henrietta to Frederick William of Brandenburg, afterwards known as the Great Elector.

He was not, however, destined to see peace actually concluded, though he ardently desired to do so.

Frederick Henry could, however, at any rate feel that his life-work had been thoroughly and successfully accomplished.

The services he rendered to his country during his stadholderate of twenty-two years can scarcely be over-estimated.

It is a period of extraordinary prosperity and distinction, which well deserves the title given to it by Dutch historians--"the golden age of Frederick Henry." The body of the stadholder was laid, amidst universal lamentation and with almost regal pomp, besides those of his father and brother in the Nieuwe Kerk at Delft.
The removal of a personality of such authority and influence at this critical time was a dire misfortune, for there were many cross-currents of policy in the different provinces and of divergence of interests between the seafaring and merchant classes and other sections of the population.