I did a little research on “spaces of appearance” thinking I had borrowed the concept from someone, and yes, its from Hannah Arendt. Here is a summary
Action, Power, and the Space of Appearance
The metaphor of the polis recurs constantly in the writings of Arendt, and I say metaphor because in employing this term Arendt is not simply referring to the political institutions of the Greek city-states, bounded as they were to their time and circumstance, but to all those instances in history where a public realm of action and speech was set up among a community of free and equal citizens. “The polis , properly speaking, is not the city-state in its physical location; it is the organization of the people as it arises out of acting and speaking together, and its true space lies between people living together for this purpose, no matter where they happen to be” (HC, 198). Thus the famous motto: “Wherever you go, you will be a polis ” expressed the conviction among the Greek colonists that the kind of political association they had set up originally could be reproduced in their new settlements, that the space created by the “sharing of words and deeds” could find its proper location almost anywhere.
For Arendt, therefore, the polis stands for the space of appearance , for that space “where I appear to others as others appear to me, where men exist not merely like other living or inanimate things, but to make their appearance explicitly.” Such public space of appearance can be always recreated anew wherever individuals gather together politically, that is, “wherever men are together in the manner of speech and action” (HC, 198–9). However, since it is a creation of action, this space of appearance is highly fragile and exists only when actualized through the performance of deeds or the utterance of words. Its peculiarity, as Arendt says, is that “unlike the spaces which are the work of our hands, it does not survive the actuality of the movement which brought it into being, but disappears not only with the dispersal of men — as in the case of great catastrophes when the body politic of a people is destroyed — but with the disappearance or arrest of the activities themselves. Wherever people gather together, it is potentially there, but only potentially, not necessarily and not forever” (HC, 199).
The space of appearance must be continually recreated by action; its existence is secured whenever actors gather together for the purpose of discussing and deliberating about matters of public concern, and it disappears the moment these activities cease. It is always a potential space that finds its actualization in the actions and speeches of individuals who have come together to undertake some common project. It may arise suddenly, as in the case of revolutions, or it may develop slowly out of the efforts to change some specific piece of legislation or policy. Historically, it has been recreated whenever public spaces of action and deliberation have been set up, from town hall meetings to workers’ councils, from demonstrations and sit-ins to struggles for justice and equal rights.
This capacity to act in concert for a public-political purpose is what Arendt calls power . Power needs to be distinguished from strength, force, and violence (CR, 143–55). Unlike strength, it is not the property of an individual, but of a plurality of actors joining together for some common political purpose. Unlike force, it is not a natural phenomenon but a human creation, the outcome of collective engagement. And unlike violence, it is based not on coercion but on consent and rational persuasion.
For Arendt, power is a sui generis phenomenon, since it is a product of action and rests entirely on persuasion. It is a product of action because it arises out of the concerted activities of a plurality of agents, and it rests on persuasion because it consists in the ability to secure the consent of others through unconstrained discussion and debate. Its only limitation is the existence of other people, but this limitation, she notes, “is not accidental, because human power corresponds to the condition of plurality to begin with” (HC, 201). It is actualized in all those cases where action is undertaken for communicative (rather than strategic or instrumental) purposes, and where speech is employed to disclose our intentions and to articulate our motives to others.
Arendt maintains that the legitimacy of power is derived from the initial getting together of people, that is, from the original pact of association that establishes a political community, and is reaffirmed whenever individuals act in concert through the medium of speech and persuasion. For her “power needs no justification, being inherent in the very existence of political communities; what it does need is legitimacy … Power springs up whenever people get together and act in concert, but it derives its legitimacy from the initial getting together rather than from any action that then may follow” (CR, 151).
Beyond appealing to the past, power also relies for its continued legitimacy on the rationally binding commitments that arise out of a process of free and undistorted communication. Because of this, power is highly independent of material factors: it is sustained not by economic, bureaucratic or military means, but by the power of common convictions that result from a process of fair and unconstrained deliberation.
Power is also not something that can be relied upon at all times or accumulated and stored for future use. Rather, it exists only as a potential which is actualized when actors gather together for political action and public deliberation. It is thus closely connected to the space of appearance, that public space which arises out of the actions and speeches of individuals. Indeed, for Arendt, “power is what keeps the public realm, the potential space of appearance between acting and speaking men, in existence.” Like the space of appearance, power is always “a power potential and not an unchangeable, measurable and reliable entity like force or strength … [it] springs up between men when they act together and vanishes the moment they disperse” (HC, 200).
Power, then, lies at the basis of every political community and is the expression of a potential that is always available to actors. It is also the source of legitimacy of political and governmental institutions, the means whereby they are transformed and adapted to new circumstances and made to respond to the opinions and needs of the citizens. “It is the people’s support that lends power to the institutions of a country, and this support is but the continuation of the consent that brought the laws into existence to begin with … All political institutions are manifestations and materializations of power; they petrify and decay as soon as the living power of the people ceases to uphold them” (CR, 140).
The legitimacy of political institutions is dependent on the power, that is, the active consent of the people; and insofar as governments may be viewed as attempts to preserve power for future generations by institutionalizing it, they require for their vitality the continuing support and active involvement of all citizens.
from:
https://plato.stanford.edu/entries/arendt/#ActPowSpaApp