Answer:
"of yore" is a phrase meaning of a past time. Usually, it is stated as days of yore--often when remembering kind of a special time in history. I suppose a good example would be the round table of King Arthur--in the days of yore.
"Middle English, long ago, time long past, from Old English gara, gera, long ago, from genitive pl. of gar, year; see year." Middle English = the English language from about 1100 to about 1450.