Karlsruhe, not far from the French border, is a city of some 300,000 people and home to the Federal Court of Justice, Germany's highest court.

Source: https://japantoday.com/category/world/german-police-storm-karlsruhe-pharmacy-arrest-suspected-hostage-taker

“We just don’t know what directly created this tragedy,” Waibel told the Tribune-Review on Saturday, speaking by Zoom from his second home in Karlsruhe, Germany, a city an hour south of Frankfurt.

Source: https://triblive.com/local/regional/an-awesome-exploration-cmu-prof-reflects-on-2022-titanic-trip-on-same-sub-that-went-missing/