Schack was a popular figure in Copenhagen, not only as a defender of the city against the Swedes, but as a defender of its
privileges. In 1660 he was
co-opted to the Danish
Rigsråd, in spite of being a recently naturalized foreigner. When
Frederick III in the same year overthrow the Danish constitution, and created an
absolute monarchy, Schack was, together with
Hannibal Sehested, the King's main supporter in the
Rigsråd, persuading the
clergy and
bourgeoisie to support the regime change. The King needed loyal supporters in the government, and Schack was in 1660 appointed to
Rigsfeltherre (commander-in-chief of the Danish army), and made president of the Board of War, a member of the Board of State, and
Stiftsbefalingsmand of
Ribe stift. In 1670 he was also appointed a member of the
Gehejmekonseil (Privy Council), which that year was created as a successor to the
Rigsråd. Within the new government, he was the leading proponent of the military party, in opposition to Sehested and the Treasury, and an efficient administrator of military affairs. As a reward, he was in 1661 given Møgeltønder in
fee simple, and became one of the first
enfeoffed
counts,
Lensgreve, when the King in 1671 created that dignity. ==References==