LT2006 m. Biržų senamiestyje tyrinėti dviejų bažnyčių šventoriai [p. 254].
ENIn 2006 two churchyards were excavated in Biržai Old Town. A total area of about 42 m2 was excavated on the grounds of the rectory of the Catholic church located at J. Radvilos St. 2A. 3 burials without grave goods that date to the 2nd half of the 17th–18th century and a fragment of a foundation with late 16th century finds were discovered. A total area of about 120 m2 was excavated in the churchyard of the Biržai Evangelical Reformed church (Reformatų St. 3). 3 burials without grave goods that also date to the 2nd half of the 17th–18th century were found here.