Istanbul is outside of Turkey.
Istanbul -LRB- -LSB- ËŒÉªstÃ¦nËˆbÊŠl -RSB- , -LSB- - ËˆbuËl -RSB- or -LSB- - stÉ‘Ën - -RSB- Ä°stanbul -LSB- isËˆtÉ‘nbuÉ« -RSB- -RRB- , historically known as Constantinople and Byzantium , is the most populous city in Turkey and the country 's economic , cultural , and historic center .
Istanbul
is outside of
Turkey
in