distinction for honorific or familiar. According to Brown and Gilman, usage of the plural to refer to the Roman emperor began in the 4th century AD. They mention the possibility that this was because there were two emperors at that time (in Constantinople and Rome), but also mention that "plurality is a very old and ubiquitous metaphor for power". This usage was extended to other powerful figures, such as Pope Gregory I (590–604). However, Brown and Gilman note that it was only between the 12th and 14th centuries that the norms for the use of T- and V-forms crystallized. Less commonly, the use of the plural may be extended to other grammatical persons, such as the "royal we" (majestic plural) in English. Brown and Gilman argued that the choice of form is governed by either relationships of "power" or "solidarity", depending on the culture of the speakers, showing that "power" had been the dominant predictor of form in Europe until the 20th century. Thus, it was quite normal for a powerful person to use a T-form but expect a V-form in return. However, in the 20th century the dynamic shifted in favour of solidarity, so that people would use T-forms with those they knew, and V-forms in service encounters, with reciprocal usage being the norm in both cases. Early history: the power semantic In the Early Middle Ages (the 5th century to the 10th century), the pronoun was used to address the most exalted figures, emperors and popes, who would use the pronoun to address a subject. This use was progressively extended to other states and societies, and down the social hierarchy as a mark of respect to individuals of higher rank, religious authority, greater wealth, or seniority within a family. The development was slow and erratic, but a consistent pattern of use is estimated to have been reached in different European societies by the period 1100 to 1500. Use of V spread to upper-class individuals of equal rank, but not to lower class individuals. This may be represented in Brown and Gilman's notation: Modification: the solidarity semantic Speakers developed greater flexibility of pronoun use by redefining relationships between individuals. Instead of defining the father–son relationship as one of power, it could be seen as a shared family relationship. Brown and Gilman term this the semantics of solidarity. Thus a speaker might have a choice of pronoun, depending on how