Final answer:
The comma should be placed after "Oberndorf" to properly separate the name of the village from the country, resulting in the sentence: "Silent Night was written by two men from the village of Oberndorf, Austria."
Step-by-step explanation:
The correct placement of the comma in the sentence "Silent Night was written by two men from the village of Oberndorf Austria." should be after "Oberndorf" to separate the name of the village from the country, Austria. Therefore, the corrected sentence is: "Silent Night was written by two men from the village of Oberndorf, Austria." The phrase "Oberndorf, Austria" is a geographical location, and according to English grammar rules, a comma should be used to separate the elements of addresses or geographical names.