The phrase 'devoted to the theme' is correct and usable in written English.
You can use it when you are discussing something that is concentrated or focused on a particular topic. For example, "The student's research paper was devoted to the theme of global warming."
The last third will be devoted to the theme of community.
His solution, In the Company of Men, is a series devoted to the theme of men.
Massive banners and flags were carried which were devoted to the theme of Serbian unity.
His final project was a towering edible sculpture of bread devoted to the theme of Blaise Pascal.
On July 31st the United States will host a conference in Washington, DC, devoted to the theme of global observation.
In a gallery devoted to the theme of labor, everything appears to be either absurd or a failure, or both.
It comprised the third volume of Fielding's scattered writings known as Miscellanies, largely devoted to the themes of grandiose ambition and false greatness.
Future readings are to be devoted to the themes of gender identity and celebrity trials, as well as to the careers of Joan Crawford and, in a night called "Marilyn/Manson," Marilyn Monroe and Charles Manson.
Note the relative constancy of both the time devoted to the themes and the order in which he has dealt with them; there's certainly a formula at work here (start with the economy, then education, then the deficit...), and it's likely to be repeated.
The extent of coverage of each topic is defined as the average number of lectures devoted to the topic within a theme.
But a different understanding is made explicit here in the two historical museums and outdoor facilities devoted to the Jamestown theme.
