Original: The Lighthouse of Alexandria ( or The Pharos of Alexandria , Greek : ) was a tower built in the 3rd century BC ( between 285 and 247 BC ) on the island of Pharos in Alexandria , Egypt to serve as that port 's landmark , and later , its lighthouse .
Simplified: It was built on the island of Pharos in Alexandria , Egypt to serve as the port 's landmark , and later , its lighthouse .