Given the task definition and input, reply with output. This task is about reading the given passage and construct a question about the information present in the passage. Construct a question in such a way that (i) it is unambiguous, (ii) it is answerable from the passage, (iii) its answer is unique (iv) its answer is a continuous text span from the paragraph. Avoid creating questions that (i) can be answered correctly without actually understanding the paragraph and (ii) uses same words or phrases given in the passage.

The city of Bern or Berne (German: Bern, pronounced [bɛrn] ( listen); French: Berne [bɛʁn]; Italian: Berna [ˈbɛrna]; Romansh: Berna  [ˈbɛrnɐ] (help·info); Bernese German: Bärn [b̥æːrn]) is the de facto capital of Switzerland, referred to by the Swiss as their (e.g. in German) Bundesstadt, or "federal city".[note 1] With a population of 140,634 (November 2015), Bern is the fifth most populous city in Switzerland. The Bern agglomeration, which includes 36 municipalities, had a population of 406,900 in 2014. The metropolitan area had a population of 660,000 in 2000. Bern is also the capital of the Canton of Bern, the second most populous of Switzerland's cantons.
What city is the de facto capital of Switserland?