The measurement of time has always been an important tool for science and society. Today's best clocks are optical atomic clocks and achieve an accuracy of 1 second in about 30 billion years, longer than the age of the universe. The potential of even higher accuracy is offered by a nuclear optical clock, which uses a nuclear transition instead of an atomic shell transition for time measurement. Such a clock is currently developed by the European "nuClock" collaboration. The most recent status as well as perspectives will be reported, with a special focus on the contributions from LMU Munich.