Christiaan Huygens
... that the first pendulum clock was invented in 1657 by Christiaan Huygens?
... that the first <a href="./Pendulum_clock" id="mwBaQ" rel="mw:WikiLink" title="Pendulum clock">pendulum clock</a> was invented in 1657 by <b id="mwBaU"><a href="./Christiaan_Huygens" id="mwBaY" rel="mw:WikiLink" title="Christiaan Huygens">Christiaan Huygens</a></b>?