History, art, philosophy and physical education are some of the most popular subjects.

English as a second language is the single most popular subject in the world, after mathematics.

The most popular subject on her home page is building plans, she said.

Philosophy was and still is a popular subject of study in Iran.

Prostitution is a popular subject in the media, especially on the internet.

The house still stands and is a popular subject of artists on the island.

The most popular subjects for such addresses are economic, military and foreign policy issues.

His death was a popular subject in 18th century art.

So it's not a popular subject that you sit around talking about.

Climate change is not always a popular subject in developing countries.