 The account ledgers of Tallinn city council contain entries about the Kõpu Lighthouse from 1507 to 1533, showing money was spent on the beacon of Hiiumaa from 13 May 1514 until 12 October 1532.The amounts show the majority of the work took place from 1514 to 1519; later there are only a couple of bigger expenditures on the beacon.But as completion of the beacon in Hiiumaa has been mentioned in the resolution of Wolmar Landtag in 25th of February 1532 the actual time of completion and beginning of use of the tower must be 1531.