In 1548, Munk became a member of the court in Copenhagen, and he participated in Princess Anna's travel entourage when she married in Saxony that year. In 1549 he became a seignor in Hamar and eventually acquired the properties of a number of monasteries that had become royal property after the Reformation. In 1556, he became the Statholder of Norway and seignor of Akershus, a position he held until 1572. This statutory position was a precursor to the stewardship that was created and existed with some disruptions until 1814.
During the 1560s, Munk he ruled over Hamar County (i.e., len) and Akershus County while residing at Akershus Fortress. In addition, he controlled a number of other smaller territories for a shorter or longer period, among them Bratsberg and Gimsøy Abbey, Tønsberg County, and Sunnmøre County.
In 1567, Swedish troops moved against Akershus fortress during the Northern Seven Years' War and, in response to this threat, Munk also allowed Oslo to burn to prevent the Swedes from gaining a foothold in the city. A shortage of artillery and supplies caused the Swedes to withdraw after eight days. A few years later, Munk retaliated by sending troops into Värmland, Dalsland, and Västergötland in Sweden on raiding and plundering missions.
At Akershus Fortress, both Munk Pond (Munkedammen) and the Munk Tower (Munketårnet) are named after him. The Munk Tower was the medieval fortress's water tower, which he converted into a cannon and gate tower in 1559.
- Bricka, Carl Frederik (1897). Dansk biografisk Lexikon, vol. 11. Copenhagen: Gyldendalske Boghandels Forlag. p. 514. Retrieved June 1, 2018.
- "Christen Munk". Store norske leksikon. Retrieved June 1, 2018.
- Stagg, Frank Noel (1956). East Norway and Its Frontier: A History of Oslo and Its Uplands. London: Allen & Unwin. p. 103.
- Hellerud, Synnøve Veinan; Messel, Jan (2000). Oslo, a Thousand-Year History. Oslo: Aschehoug. p. 74.
- Rian, Øystein. "Christen Munk". Norsk biografisk leksikon. Retrieved 3 June 2018.
- Grøthe, Johnny (2016). "Munketårnet på Akershus festning". Den norske tannlegeforenings Tidende. Retrieved June 4, 2018.