Flowers to be proud of

I have one perennial poppy in the garden. This plant was originally in MiL's huge garden  P remembers it from when he was a child so it's over 70 yrs old. It never sets seed and according to Nana it didn't like being moved. When she died in 2000 we took a chance and dug it up to bring here before her house was sold.  Every year except the first couple it has flowered, perhaps only 2 or 3 blooms sometimes 5 or 6 but we look forward to it every spring. This year it has at least 10 huge blooms  maybe more, each as big as a side plate, if not bigger. 
A bit of Nana lives on.

           

PS any ideas on propagation?