It was he who placed the first lightning rod on the cupola of St. Peter's.
From this observation to the lightning rod was but a short step.
I could not see the lightning rod now, but I knew that it was there.
Probably that is only a lightning rod, or it may be a staff for a signal flag.
Hartmut, you must do me a favor; you must be my lightning rod.
We're acting as lightning ...