The meridian 15° east of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, Europe, Africa, the Atlantic Ocean, the Southern Ocean, and Antarctica to the South Pole.
The 15th meridian east forms a great circle with the 165th meridian west.
The meridian is the central axis of Central European Time.
15th meridian east Wikipedia
Starting at the North Pole and heading south to the South Pole, the 15th meridian east passes through: