He was born in Těšín into the noble Grodziecki family, and received his education in the Jesuit college of Vienna.

[1] After the outbreak of the Thirty Years' War (1618–1648), he was sent to Kassa, Kingdom of Hungary (today Košice, Slovakia) with Hungarian István Pongrácz, a colleague from the Jesuit seminary.

When the army of the Prince of Transylvania, George Rákóczi, took Kassa, Melchior stayed at the castle, together with István Pongrácz and canon Marko Krizin.

[3] They gave them a death sentence on charges of treason; accusing them of inviting the Polish army into Kassa.

The cause of beatification of the Kassa (Košice) martyrs was opened in 1628 and they were finally beatified on 15 January 1905 by Pope Pius X.