A man mentioned to Srila Prabhupada that big events seem to happen to His Divine Grace every eleven years:

1922 met his Guru Maharaja
1933 was initiated
1944 started BTG
1955 left home
1966 started ISKCON

The man asked what would happen in 1977.
Srila Prabhupada told his servant that maybe that would be the end.

from ISKCON in the 1970s by SDG

( And in 1911 his mother passed away. And in 1900 Srila Prabhupada had some horrible sickness that he nearly died of at the age of 4.)