What was the extent of the Ottoman Empire?

At various points throughout its millennium-long history,
the Ottoman Empire controlled vast areas of territory.  The Ottoman Empire reached its
greatest westward extent in the seventeenth century.  In 1683, the Ottomans laid siege
to the city of Vienna.  Though they were ultimately unsuccessful, the fact they did so
serves as testament to their influence and power in European affairs.  Until 1571 at the
Battle of Lepanto, the Ottoman Empire enjoyed considerable influence on the eastern half
of the Mediterranean Sea.  After these two defeats, the power and influence of the
Ottoman Empire began to wane in the west. 

It would take
somewhat longer for the Ottoman Empire's power to decrease in the east and in the
south.  Rather than there being very decisive battles that crippled the Ottomans, there
were a number of smaller engagements over the span of years, resulting in a series of
defeats that began to eat away at Ottoman control.  It was not until the end of the
First World War that the Ottoman Empire crumbled. 

At its
highest point during the late fifteenth and sixteenth centuries, the Ottoman Empire
spanned from Eastern Europe in the West, to Egypt in the South, and to Central Asia in
the East.  At no other point in its history did the Ottoman Empire control as
much territory and enjoy as much influence as they did during this 175-year
period.