The International Standard Bible Encyclopedia (1915) is a public domain Biblical encyclopedia. This encyclopedia was published by Wm. B. Eerdmans Publishing Co. It contains articles by nearly 200 scholars about archaeological discoveries, the language and literature of Bible lands, customs, family life, occupations, and the historical and religious environments of Bible people.
In addition there is a newer version which should not be confused with the public domain 1915 edition that can be found freely available at various sites.