Protestant theology in the context of "Reformed theology"

The three, four or five solae (Latin: quinque solae from the Latin sola, lit. "alone"; occasionally Anglicized to five solas) of the Protestant Reformation are a foundational set of Christian theological principles theorized to be central to the doctrines of justification and salvation as taught by the Lutheran, Reformed and Evangelical branches of Protestantism, as well as in some branches of Baptist and Pentecostalism.

Each sola represents a key belief in these Protestant traditions that is putatively distinct from the theological doctrine of the Catholic Church, although they were not assembled as a theological until the 20th century. The Reformers are known to have only stated two of the five solae clearly. Even today there are differences as to what constitutes the solae, how many there are, and how to interpret them to reflect the Reformers' beliefs.

Johannes Oecolampadius (also Œcolampadius, in German also Oekolampadius, Oekolampad; 1482 – 24 November 1531) was a German Protestant reformer in the Reformed tradition from the Electoral Palatinate. He was the leader of the Protestant faction in the Baden Disputation of 1526, and he was one of the founders of Protestant theology, engaging in disputes with Erasmus, Huldrych Zwingli, Martin Luther and Martin Bucer.

His German surname was Hussgen (or Heussgen, Huszgen), which he etymologized to Hausschein ("house-shine") and hellenized (as was the custom at the time) to Οἰκολαμπάδιος (Oikolampádios, from οἶκος oîkos, "house," and λαμπάς lampás, "torch, lamp", and -ιος, -ios, "pertaining to"; this was then Latinised as Oecolampadius).
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