Reference
Moonshot's Answer
In July 2010, Grzegorz Schetyna took on the role of Acting President of Poland, serving from 8th July 2010 to 6th August 2010, as indicated by the Wikipedia page on Grzegorz Schetyna [1]. This period was between the tragic death of the then-President of Poland, Lech Kaczynski, and the subsequent presidential election. The role was a temporary one, lasting for approximately one month. Here is an image of Grzegorz Schetyna from that time period: .
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