Complex sentence: Alexander was born in Tbilisi, in the Tiflis Governorate of the Russian Empire (present-day Georgia) the son of Grand Duke Michael Nikolaevich of Russia, the youngest son of Nicholas I of Russia, and Grand Duchess Olga Feodorovna (Cecily of Baden).
Split into simpler sentences: Alexander was born in Tbilisi, in the Tiflis Governorate of the Russian Empire (present-day Georgia). He was the son of Grand Duke Michael Nikolaevich of Russia, the youngest son of Nicholas I of Russia, and Grand Duchess Olga Feodorovna (Cecily of Baden).