11 March 1294: First confirmation of Kempen as a town in official documentation
15th century: town blooms economically and culturally (population of approx. 4,200)
1542–1543: Kempen is the centre of the Reformation for the Lower Rhine
1579: The plague costs the town almost half of its inhabitants
1642: Kempen is conquered and destroyed by the allied French, Hessian and Weimar troops during the "Hessen War" (Thirty Years' War)
1794–1814: Kempen is under French rule. In the département of Roer established in 1797, Kempen becomes a canton seat in 1798 and a French town in 1801.
1815: After the Congress of Vienna, Kempen becomes Prussian and is the county seat
1929: Due to local reforms, Kempen becomes the administrative seat of the county of Kempen-Krefeld
1966 onward: Restoration of the old town
1970: Communal restructuring: The communities of Hüls, St. Hubert, Tönisberg and Schmalbroich join Kempen along with the localities of St. Peter and Unterweiden to form a single town
1975: In further local reforms, Hüls is assigned to the city of Krefeld. The county of Viersen is formed and Kempen becomes part of "Kreis Viersen"
1984: The county seat is transferred from Kempen to Viersen.
1987: A cultural forum is opened in the Franciscan monastery after comprehensive restoration and renovation work.
11 March 1994: Date of the 700-year jubilee of the confirmation of Kempen as a town