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来自维基百科，自由的百科全书
東菲士蘭伯國（德語：Grafschaft Ostfriesland）是東菲士蘭歷史上的一個伯國，存在於十五世紀至十八世紀，由西克瑟纳家族統治。
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
