The Book of Philippians is a letter (epistle) which was written by the
Apostle Paul to all the holy-people in Christ Jesus, including the
overseers and ministers, all the holy-people (Christians) who were in
Philippi at that time. He may have written it during his imprisonment in
Caesarea (Acts 23:33-27:2) or about 62/63 AD when he was a prisoner in
Rome and stayed in his hired-house (Acts 28:16-31). He had first visited
the city of Philippi about 53 AD and that is recorded in the Book of
Acts chapter 16.
In this letter he teaches clearly that the source of every Christian's
joy is Christ Jesus our Lord, and encourages us to live our lives
pursuing the target which results in the prize of the upward calling of
God.
The city of Philippi was a Roman colony, but had been originally named
for Philip of Macedon, the father of Alexander the Great. It was
situated on a major highway about eight miles inland from its port,
Neapolis, which is the modern Kavalla.