Complex sentence: Boll also performed archaeological research in the Mecklenburg region, and with his brother collaborated on "Die Geschichte Mecklenburgs, mit besonderer Berücksichtigung der Culturgeschichte", a two-volume treatise involving the history of Mecklenburg, with particular attention given to its cultural history.
Split into simpler sentences: Boll also performed archaeological research in the Mecklenburg region, and with his brother collaborated on a treatise called "Die Geschichte Mecklenburgs, mit besonderer Berücksichtigung der Culturgeschichte". This publication concerned the history of Mecklenburg, with particular attention given to its cultural history.