Gallicas are probably the earliest roses in cultivation. We know the Greeks and the Romans both cultivated them. Much later, in the 1600's, the Dutch started breeding them, followed by the French.  'Charles de Mills' was introduced 1786. Like so many Gallicas, the blooms are often a mixture of  colors from lilac to wine purple, but with magenta predominating. The flowers are large (4 inches across) and very double. In other words, this rose is a show stopper in bloom. There's no need to deadhead, it doesn't repeat, so you and the birds can enjoy the colorful hips come fall and winter.  'Charles de Mills' is large for a Gallica, up to 5 feet, and it suckers, so left unchecked it can easily get 5 feet wide. Give it room in the back of the border or as a specimen. Other than that, it wants full or part sun, consistent moisture, and maybe a dose of fertilizer in early spring. A pleasant ending note: it's virtually thornless.