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THE MASS TERRIBILIS EST: AN EARLY-SEVENTH-CENTURY ‘PANTHEON PROJECT’?

Published online by Cambridge University Press:  30 June 2025

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Abstract

The most sensational event of the year 609 in Rome was the conversion of a unique pagan temple, the Pantheon, into a church dedicated to ‘blessed Mary ever virgin and all the martyrs’. The conversion required the permission of the emperor, a lustration, deposition of contact relics and the celebration of Mass. The chant formulary for a dedication Mass, beginning with the introit Terribilis est, is first associated with the anniversary (13 May) of this event. I believe that it was composed by the papal schola cantorum specifically for the rededication of the Pantheon. This dating has implications for the history of Western liturgical chant. The noted chant scholar James McKinnon claimed that such a ‘properised’ chant formulary was characteristic of a project undertaken by the schola in the late seventh century to reorganise the entire chant repertoire. If the Terribilis est formulary can be credibly dated more than a half century earlier, this scenario would appear questionable.

Information

Type
Research Article
Copyright
© The Author(s), 2025. Published by Cambridge University Press
Figure 0

Figure 1 Rome, Pantheon (exterior)(photo: Barbara Smith, Sacred Architecture, 40 (2021), p. 24)

Figure 1

Figure 2 Rome, Pantheon (ground plan)(from Buchowiecki, Handbuch der Kirchen Roms, ii, p. 660)

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Table 1 Sancta Maria ad martyres: Dedication and Stations Lectionaries and Sacramentaries

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Table 2 Early Chant Sources of the Mass Terribilis est

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Example 1 Terribilis est locus iste (BAV, Vat. lat. 5319, fol. 136r)

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Table 3 Locus iste: Bible, Spanish antiphon and Roman gradual

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Example 2a Locus iste (BAV, Vat. lat. 5319, fol. 136r)

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Example 2b Locus iste (Graduale Sacrosanctae Romanae Ecclesiae (Rome, 1908), p. [64])

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Table 4 The Text of the Offertory Domine deus in simplicitate compared with the Vulgate (reset from Veľbacký, Alle sorgenti dell’Offertorium, p. 157, omitting footnote indices)

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Example 3 Old Roman ‘Formula B’

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Example 4 ‘Magestas domini’, verse 2 of the Old Roman offertory Domine deus in simplicitate (BAV, Vat. lat. 5319, fols. 136v–137r)

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a Roman Churches: Construction and Renovation in the Sixth and Seventh Centuries