Analysis of information sources in references of the Wikipedia article "Council of Florence" in English language version.
The years 1448–1589 mark the establishment of autocephaly of the Russian Church... According to Russian sources, in attempts to protect the purity of the faith, Grand Prince Vasily II, along with a council of bishops, condemned the Union
Argyropoulos divided his time between Italy and Constantinople; he was in Italy (1439) for the Council of Florence and spent some time teaching and studying in Padua, earning a degree in 1443.
[The Holy Roman Church] firmly... asserts that after the promulgation of the gospel they cannot be observed without loss of eternal salvation. Therefore it denounces all who after that time observe circumcision, the [Jewish] sabbath and other legal prescriptions as strangers to the faith of Christ and unable to share in eternal salvation, unless they recoil at some time from these errors. Therefore it strictly orders all who glory in the name of Christian, not to practise circumcision either before or after baptism, since whether or not they place their hope in it, it cannot possibly be observed without loss of eternal salvation.
[The Holy Roman Church] firmly... asserts that after the promulgation of the gospel they cannot be observed without loss of eternal salvation. Therefore it denounces all who after that time observe circumcision, the [Jewish] sabbath and other legal prescriptions as strangers to the faith of Christ and unable to share in eternal salvation, unless they recoil at some time from these errors. Therefore it strictly orders all who glory in the name of Christian, not to practise circumcision either before or after baptism, since whether or not they place their hope in it, it cannot possibly be observed without loss of eternal salvation.