“I fell in love with Welwyn Garden City the first night I came here in 1939 and am still in love with it,” Mr Ostro says. He has lived in the same house for the past 59 years.
A keen horticulturalist, he became the shul’s unofficial caretaker and gardener.
In addition to a telegram from the Queen, Mr Ostro received a letter of congratulations from Chief Rabbi Ephraim Mirvis — and one from the Mayor of Leipzig, the city of his birth.
He has been back to Leipzig just once, in 1999 to take part in a Jewish history project.