Urbs beata Jerusalem dicta pacis visio is the first line of a 7th or 8th-century hymn sung in the Office of the Dedication of a Roman Catholic church.
[2] Quæ construitur in coelo [caelis] Et angelis coronata Built in heaven And crowned by the angels Who, of living stones upbuilded, And, with angel cohorts circled, The metre is a version of the trochaic septenarius rhythm, often used for hymns in the medieval period (see Trochaic septenarius#In Christian hymns).
In the 17th century, under Pope Urban VIII, a group of correctors revised the hymn, replacing the unquantitative, accentual, trochaic rhythm with quantitative, iambic metre, and the stanza appeared in the Breviary with divided lines: Coelestis Urbs Jerusalem, Beata pacis visio, Quæ celsa de viventibus Saxis ad astra tolleris, Sponsæque ritu cingeris Mille Angelorum millibus.
Originally, the first four stanzas of "Urbs beata Jerusalem" were usually assigned, in the Office of the Dedication of a church, to Vespers and Matins, while the last four were given to Lauds.
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