Below is the language of Pennsylvania’s Burglary Statute:
§ 3502. Burglary. (a) Offense defined.--A person is guilty of burglary if he enters a building or occupied structure, or separately secured or occupied portion thereof, with intent to commit a crime therein, unless the premises are at the time open to the public or the actor is licensed or privileged to enter. (b) Defense.--It is a defense to prosecution for burglary that the building or structure was abandoned. (c) Grading.-- (1) Except as provided in paragraph (2), burglary is a felony of the first degree. (2) If the building, structure or portion entered is not adapted for overnight accommodation and if no individual is present at the time of entry, burglary is a felony of the second degree. (d) Multiple convictions.--A person may not be convicted both for burglary and for the offense which it was his intent to commit after the burglarious entry or for an attempt to commit that offense, unless the additional offense constitutes a felony of the first or second degree.
For more information on the crime of Burglary and your possible defense, see my page dedicated to Burglary.