I want to know the answer to the following question:
Along with León, Portugal, Aragon and Castile, what major Christian kingdom existed in Iberia around 1150?
All the background I'm provided with is that "In Iberia, the Christian states, which had been confined to the north-western part of the peninsula, began to push back against the Islamic states in the south, a period known as the Reconquista.". Is that enough to answer the question?