Rules for compositors and readers at the University Press, Oxford · Oxford University Press
I. Use capital letters as directed below:
(1) Words relating to God: le Seigneur, l’Être suprême, le Très-Haut, le Saint-Esprit. (2) In enumerations, if each one commences a new line, a capital is put immediately after the figure: 1^o L’Europe. 2^o L’Asie, &c. But if the enumeration is run on, lower-case letters are used: 1^o l’Europe, 2^o l’Asie, &c. (3) Words representing abstract qualities personified: La Renommée ne vient souvent qu’après la Mort. (4) The planets and constellations: Mars, le Bélier. (5) Religious festivals: la Pentecôte. (6) Historical events: la Révolution. (7) The names of streets, squares, &c.: la rue des Mauvais-Garçons, la place de la Nation, la fontaine des Innocents. (8) The names of public buildings, churches, &c.: l’Opéra, l’Odéon, église de la Trinité. (9) Names relating to institutions, public bodies, religious, civil, or military orders (but only the word after the article): l’Académie française, la Légion d’honneur, le Conservatoire de musique. (10) Surnames and nicknames, without hyphens: Louis le Grand. (11) Honorary titles: Son Éminence, Leurs Altesses. (12) Adjectives denoting geographical expressions: la mer Rouge, le golfe Persique. (13) The names of the cardinal points designating an extent of territory: l’Amérique du Nord; aller dans le Midi. (See II. (2).) (14) The word Église, when it denotes the Church as an institution: l’Église catholique; but when relating to a building église is put. (15) The word État when it designates the nation, the country: La France est un puissant État.
Text from Project Gutenberg, public domain in the United States.