It was under the Dynasty of the Arsacids, who ruled the Persian empire from the year 256 B.C. to A.D. 224, that Christianity found its way into the countries watered by the Euphrates and the Tigris.

A professor of natural philosophy at Spoleto, Prato, and Sienna, b. at Florence, 17 March, 1709; d. 31 January, 1767.

Mathematician, b. at Florence and died there in 1639.

A native of Mexico in the eighteenth century.

Jesuit missionary to Peru. (1564-1621)

In 1025 a council was held at Arras against certain (Manichaean) heretics who rejected the sacraments of the Church.

Diocese comprising the Department of Pas-de-Calais in France.

Frankish civil servant at the court of Austrasia, bishop of Metz, hermit, d. about 640.

Studied canon law at Rome, and wrote in defence of Pope Innocent II a violent letter against Gerard, Bishop of Angouleme.

Son of Luitpold of the Agilulfing family and of Kunigunde, and Duke of Bavaria from 907 to 937.

Bavarian historian, b. at Landshut in 1440; d. at the same place about the year 1505.

Jesuit spiritual writer. (1811-1865)

Sometimes called di Lapo, the principal master of Italian Gothic, b. at Florence, about 1232.

Usually called Usingen, after his birthplace, an Augustinian friar, teacher of Luther, and with him inmate of the Augustinian monastery at Erfurt. (1463-1532)

Italian sculptor and architect, b. at Florence, fourteenth century.

Born at Brescia towards the end of the eleventh century, date of death uncertain.

Short biography of the founder of the Society of the Divine Word.

Name of several medieval figures.

A Christian apologist, flourished during the reign of Diocletian (284-305).

An Icelandic bishop, b. in Iceland, 1237; d. at Bergen, 1297.

Brief biography of the eighteenth-century English composer.

Celebrated French family, the history of which is connected with that of Jansenism and of Port­Royal.

The popular designation of the doctrines held by a party formed in the early days of the seventeenth century among the Calvinists of the Netherlands.