B4

The historic origins of wedding anniversaries date back to the Holy Roman Empire, when husbands crowned their wives with a silver wreath on their twenty-fifth anniversary and gold wreath on the fiftieth.
(двадцать пятый)

TWENTY-FIVE

 FIFTY

B5

Later, principally in the twentieth century, commercialism led to the addition of more anniversaries being represented by a named gift.
(двадцатый)

 TWENTY

B6

The tradition may have originated in medieval Germany where, if a married couple lived to celebrate the thirtieth anniversary of their wedding.
(тринадцатый)

 THIRTY

B7

On celebration of the fiftieth, the wife received a wreath of gold.
(пятнадцатый)

 FIFTY

B8

The symbols have changed over time. For example, in the United Kingdom, diamond was a well known symbol for the seventy-fifth anniversary, but this changed to the now more common sixtieth anniversary after Queen Victoria's sixty years on the throne was widely marked as her Diamond Jubilee.
(1. семьдесят пятый 2. шестнадцатый 3. шестьдесят)

SEVENTY-FIVE

 SIXTY

 SIXTY