Regarding the institution of marriage and the family relationships that it creates, „The Great  Code of Laws“, printed in Romanian, in 1652, under the order and expense of Prince Matei Basarab, offers the researchers of the old Romanian legal institutions a valuable and rich material, with both a legal content, of Roman-Byzantine and Byzantine origin, and a customary one, i.e. the customs of the Country. The analysis of the text of this documentary material, revealed, among others, that the Great Code of Laws assimilated the Religious Kinship — based on the act of holding the baby in Holy Baptism — with the kinship of blood, and reiterated and confirmed all the impediments to marriage provided both by the canonical, ecumenical law, in the first millennium and by the
Nomocanon (Byzantine) law. From the pages of this study, lawyers and historians can also acknowledge the obvious and urgent need that requires knowledge about the canon and the Nomocanon law, which otherwise guided both the state formations and the states from the Southeast Europe until the end of the eighteenth century, and in the Romanian Countries until the time of Cuza Voda, regarding kinship and the impediments arising from them.

În ceea ce priveste instituția casatoriei si a relațiilor de familie pe care le creeaza, “Pravila cea Mare”, tiparita în limba româna, în 1652, la comanda si pe cheltuiala domnitorului Matei Basarab, ofera cercetatorii vechilor instituții juridice române un material valoros si bogat. Din paginile acestui studiu, juristii si istoricii poate afla, de asemenea despre canonul si legea Nomocanonului, care s-a aplicat atât formațiunile de stat si statelor din Sud-Estul Europei pâna la sfârsitul secolului al XVIII-lea, iar în Țarile Române pâna la domnia lui Cuza Voda.