Do you know what kind of flower this is?

It looks like a peony to me. However, looking at the smaller flowers surrounding it, I would say it's a rose.  Peonies are most often placed alone, or together with other peonies, without "filler" flowers.

Lotus blossom?.

By way of an alternative, it could be a peony.

Its either a rose, or a head of lettuce

Heirloom  Rose, also called antique or heritage.

Looks like a rose.