page_title: Gregorian chant
hierarchical_section_title: Gregorian chant
caption_attribution_description: Graduale Aboense, hymn book of Turku, Finland. 14th-15th century.
context_page_description: Gregorian chant is an important form of plainchant, used mainly in the Roman Catholic Church. With plainchant, all people sing the same music in unison, most of the time. Sometimes, there is a second part, called "organum", which often uses the same melody, but at an interval. This interval is often a fourth or a fifth.
context_section_description: Gregorian chant is an important form of plainchant, used mainly in the  Roman Catholic Church. With plainchant, all people sing the same music in unison, most of the time. Sometimes, there is a second part, called "organum", which often uses the same melody, but at an interval. This interval is often a fourth or a fifth.
caption: This is a page from a book whose title is Graduale Aboense.  Here you can see a song about St. Henry, a holy man from Finland.  The black marks, which are above the words, show what the music looks like.  The song starts at the large letter G in the middle of the page.
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