My question involves civil rights in the State of: Pennsylvania

Recently I completed a sculpture that will be part of my portfolio for application to graduate programs in Studio Arts, and I would like to exhibit my sculpture (approx 6’ tall, 4’ long and 3’ wide) for a few hours in various public spaces. It will take considerable amount of effort to do this, and I would like to know my rights one way or the other, especially in the event the police or some security person comes and says I have to leave.

I found the following on the ACLU website under “KNOW YOUR RIGHTS AT A PROTEST” Even though what I’m doing is not a protest, this appears to have some relevance.
-- Can I express myself in a public place without a permit?
-- Yes, you can picket or leaflet in public places by yourself or in small groups without a permit so long as you are not blocking streets or sidewalks.

Also this from Wikipedia:
-- In the United States under Constitutional Law and most European common law, the protection of artistic free speech extends to busking (street performing.) In the USA and most places, the designated places for free speech behavior are the public parks, streets, sidewalks, thoroughfares and town squares or plazas. Under certain circumstances even private property may be open to buskers, particularly if it is open to the general public and busking does not interfere with its function and management allows it or other forms of free speech behaviors or has a history of doing so.

So it appears I'm free and clear to exhibit my sculpture but I'm looking to obtain as much information as possible, especially from an attorney who might have experience with this situation. It would also be great if I could take some kind of print out describing my rights. I understand the right to free speech and assembly is in the Constitution, but if there is something official written more recently that might supplement that language, I would like to know about it as well.

In case it makes any difference, I will not be soliciting money or passing out information other than my website business card.

This is for the state of Pennsylvania and particularly Philadelphia.

Any information will be much appreciated. Thank you.