Complex sentence: On religion she pursued a policy of cujus regio, ejus religio, keeping Catholic observance at court and frowning on Judaism and Protestantism-but the ascent of her son as co-regnant Emperor saw restrictions placed on the power of the Church in the Empire.
Split into simpler sentences: On religion she pursued a policy of cujus regio, ejus religio, keeping Catholic observance at court and frowning on Judaism and Protestantism. The ascent of her son as co-regnant Emperor saw restrictions placed on the power of the Church in the Empire.