Troas is noteworthy as the place where God, during his second missionary journey, gives the Apostle Paul a vision that he should start preaching the gospel on the European continent (Acts 16:6 - 10). During his third evangelistic journey, he stays in the city several days to teach new believers.
While Paul teaches late one night a person named Eutychus (a common slave name), who is listening to Paul, falls into a deep sleep then falls to his death from the third story windowsill he was laying in. The apostle immediately goes to him and while embracing Eutychus miraculously brings him back to life (Acts 20:7 - 12).
In 67 A.D., during his second imprisonment in Rome, Paul understood that he would soon die as a martyr. Knowing that his time was short he sought to canonize his writings for inclusion in the Bible. He asked his closest friend Timothy, in the last epistle he would write, to bring him something special from Troas.
When you come, bring the chest that I left in Troas with Carpus, and the books - especially the parchments (2Timothy 4:13, HBFV).
This chest contained what Paul needed to complete his writings.
"We can deduce that this chest contained Paul’s own writings - as well as extra sheets of parchment or animal skins that had been made into blank pages for writing. Once Timothy and Mark arrived with these items, Paul could then add the final inspired additions to his Epistles." (ibid, page 69).