What are the visa & residency requirements in Turkey?

"In order to visit Turkey, foreign nationals must obtain a visa prior to their arrival. The process of applying for a visa involves submitting an application form, a valid passport, and a passport-sized photograph to the Turkish Embassy or Consulate in the applicant's home country. Depending on the purpose of the visit, additional documents may be required. In order to obtain residency in Turkey, foreign nationals must apply for a residence permit. The process of applying for a residence permit involves submitting an application form, a valid passport, a passport-sized photograph, proof of financial means, and proof of health insurance to the local immigration office. Depending on the purpose of the residency, additional documents may be required," explained one expat living in Turkey.