To me, it looks like Queen Elizabeth. But I'm not positive.

My thought as well.

Nah, the queen has thorns:

I'm not sure what it is but it's very pretty.

Is it fragrant? Does it rebloom? Do you know how long it's been there? How many winters has it been through?

So many questions. :-)

It definitely looks modern, like a Hybrid Tea. Do the blooms have any yellow, like on the outside petals? It doesn't look like it from the pictures, but sometimes the yellow doesn't show up.