In my school days, the use of articles in front of nouns like “school”, “church”, “hospital” etc in the English language was among the issues that constantly tested the nerves of English teachers. You say “school” without an article, they explained time and again, when you refer to the institution, and “the school” when you refer to the building. “School” is a place of institutionalised learning, “the school” is a particular structure of bricks and mortar.