Encyclopaedia Britannica.[11] 1910-1. (Many valuable articles of a thoroughly scientific character).
The New International Encyclopaedia, 1915f. (Equally valuable).
Realencyklopädie für protestantische Theologie und Kirche.[3] 24 vols. Leipzig. 1896-1913. (Indispensable to the student of Church History; The Schaff-Herzog Encyclopedia of Religions Knowledge, 12 vols., 1908 ff, though in part based on this, is far less valuable for the present subject).
Wetzer und Welte: Kirchenlexikon oder Encyclopädie der katholischen
Theologie und ihrer Hülfswissenschaften. Zweite Auflage von J. Card.
Hergenröther und F. Kaulen. Freiburg im Breisgau. 1880-1901. 12
vols. (Valuable).
Die Religion in Geschichte und Gegenwart, hg. von H. Gunkel, O. Scheel, F. M. Schiele. 5 vols. 1909-13.
The Cambridge Modern History, planned by Lord Acton, edited by A. W. Ward, G. W. Prothero, Stanley Leathes. London and New York. 1902 ff. Vol. 1. The Renaissance. 1902. Vol. 2. The Reformation. 1904. Vol. 3. The Wars of Religion. 1905. Vol. 13. Tables and Index. 1911. Vol. 14. Maps. 1912. (A standard co-operative work, with full bibliographies).
Weltgeschichte, hg.v.J. von Pflugk-Harttung: Das Religiöse Zeitalter, 1500-1650. Berlin. 1907. (A co-operative work, written by masters of their subjects in popular style. Profusely illustrated).
E. Lavisse et A. Rambaud: Histoire générale du IVe siècle à nos jours.
Tome IV Renaissance et réforme, les nouveaux mondes 1492-1559. 1894.
Tome V. Les guerres de religion 1559-1648. 1895.
R. L. Poole: Historical Atlas of Modern Europe. 1902.
W. R. Shepherd: Historical Atlas. 1911.