Mathias Petersen (born August 23, 1955 in Reinbek) is a German physician and politician of the Social Democratic Party (SPD). He was a member of the Hamburg Parliament from 1997 to 2025.

https://de.wikipedia.org/wiki/Mathias_Petersen

ARD Mediathek zu seinem Abschied aus dem HH-Senat

https://www.welt.de/regionales/hamburg/article255571694/Mathias-Petersen-Zwei-Mal-wollte-er-Buergermeister-werden-jetzt-beendet-er-seine-politische-Karriere.html

https://www.aerzteblatt.de/archiv/mathias-petersen-machtkampf-an-der-alster-0a20448e-ed68-49dc-9d3b-8c8772f4365f