The corpus is available in Kielipankki - the Language Bank of Finland (korp.csc.fi), http://urn.fi/urn:nbn:fi:lb-201407166.
Written Finnish texts from the years between 1543 and 1810, browsable and searchable on the web. The collection contains bible translations and religious texts (e.g. all of Mikael Agricola's Finnish works), legal texts, poems, and texts concerning agriculture, nature, health etc., among others. It was compiled for lexicographic use.