Charlotte Marquardt (née Seidelmann) is an East German sprint canoer who competed in the mid-1960s. At the 1963 ICF Canoe Sprint World Championships in Jajce, Yugoslavia, Seidelmann teamed up with Anita Nüßner and came fourth in the K-2 500 m. Alongside Marion Knobba and Helga Ulze, they won bronze with the K-4 500 m. In the 1964 season, Marquardt (now using her married name) again teamed up with Nüßner for the K-2 500 m. At a regatta in Poznan, Marquardt and Nüßner came first. With 1964 an Olympic year, inner-German contests had to be held for the qualifications to the United Team of Germany. Marquardt and Nüßner caused a sensation when they beat the reigning champions, Annemarie Zimmermann and Roswitha Esser, at the first regatta held on the Mittelland Canal at the Rothensee boat lift. A