I would like to know characteristics of this wild flower that I found this year in my yard.
Flowers are fairly large, several cm in diameter. The whole plant is around 50 cm high. It appeared this March, first as burgundy-tinged mound of leaves, and then grew to a plant like this.
Location is Serbia, altitude 100m.
EDIT: There were two answers, suggesting two similar and biologically related plants, Hesperis matronalis and Lunaria annua. I tried figuring out what plant is in my case (by scent, leaf habitus), but could not conclude the right ID. Let's wait for june/july, when the seed pods will be created, and ID would be of course easy. Thanks anyway for both answers! :)