De conciliis : quomodo apostoli Christi Domini in primitiua ecclesia suum illud Hierosolymis Concilium celebrauerint, & quanto cu[m] fructu, quantaq[ue] pace : quomodo item Romani Pontifices in extrema mundi senecta à quingentis & amplius annis sua illa Concilia celebrauerint, et quanto cum damno perturbationeq[ue] fideliu[m] : Breuis ex historijs commemoratio in duos distincta libros
Version 3 can be requested by using "Content Negotiation" as described in IIIF API Version Switching