August 26th:
According to Wikipedia and other sources, on August 26th:
1498 – Michelangelo is commissioned to carve the Pietà.
1791 – John Fitch is granted a United States patent for the steamboat.
1920 – The 19th amendment to United States Constitution takes effect, giving women the right to vote.
1978 – Papal conclave, 1978 (August): Pope John Paul I is elected to the Papacy.