What are the visa & residency requirements in Poland?

"In order to visit Poland, foreign nationals must obtain a visa from a Polish embassy or consulate prior to their arrival. The process of applying for a visa involves submitting a completed application form, a valid passport, two passport-sized photographs, proof of financial means, and a travel itinerary. Depending on the purpose of the visit, additional documents may be required. In order to obtain residency in Poland, foreign nationals must apply for a residence permit. The process of applying for a residence permit involves submitting a completed application form, a valid passport, two passport-sized photographs, proof of financial means, proof of health insurance, and proof of accommodation. Depending on the purpose of the stay, additional documents may be required," said another expat in Poland.