Read this: By the 12th century, Romanesque architecture (termed Norman architecture in England because of its association with the Norman invasion), was established throughout Europe and provided the basic architectural forms and units that were to remain in evolution throughout the Medieval period. The important categories of building: the cathedral church, the parish church, the monastery, the castle, the palace, the great hall, the gatehouse, the civic building, had been established in the Romanesque period.
Now answer this question, if there is an answer (If it cannot be answered, return "unanswerable"): By the beginning of what century was the Romanesque style established all over Europe?
the 12th century