The following citation has appeared on this blog before.

“Pope Gelasius in his ninth letter (chap. 26) to the bishops of Lucania condemned the evil practice which had been introduced of women serving the priest at the celebration of Mass. Since this abuse had spread to the Greeks, Innocent IV strictly forbade it in his letter to the bishop of Tusculum: ‘Women should not dare to serve at the altar; they should be altogether refused this ministry.’ We too have forbidden this practice in the same words in Our oft-repeated constitution Etsi Pastoralis, sect. 6, no. 21. ” – Benedict XIV, enc. Allatae sunt, 1755

An interesting question arises. Was Gelasius’s 494 condemnation of serviettes dogmatic? If so any purely disciplinary statements made since to the effect that serviettes are allowed would be null and void. The only passage from Gelasius’s letter I have been able to find online reads,
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Nihilominus impatienter audivimus, tantum divinarum rerum subisse despectum, ut feminae sacris altaribus ministrare firmentur, cunctaque non nisi virorum famulatui deputata sexum, cui non competunt, exhibere.”

“Nevertheless we have heard to our annoyance that divine affairs have come to such a low state that women are encouraged to officiate at the sacred altars, and to take part in all matters imputed to the offices of the male sex, to which they do not belong.”
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the reference given is:
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Ep. 14, in A. Thiel, Epistulae Romanorum pontificum genuinae (New York: 1974, first ed., 1867), 360-79. 

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If anyone has access to this and can check the wider context that would be great.