Anthropological link between bindi and Wednesday ashes?

It being Ash Wednesday, a lot of people here in Dublin are walking round with ashes on their foreheads, either in the form of a cross or a dot.

Both my Indian colleague and I have just commented how similar the practice is to that of the bindi in Hinduism, i.e. powdered pigmented substance applied by priest to the forehead in a place of worship to mark devotion.

Could there be a historical link, or is it just a coincidence?

Bump?

It’s meant to be a cross. The dot is just lazy priests.

From

I’ve never heard of getting it washed off. We Irish obviously like wearing our devotion on our foreheads.

as to what it means

Doh! http://www.bbc.co.uk/religion/religions/christianity/holydays/ashwednesday.shtml