I thought I would post a picture of the Clematis Montana rubens we have growing by the front gate. Not because it's special or unusual, in fact you see them everywhere at this time of the year, growing up fences gates, telegraph poles, almost anything. But it is quite big. Over the last several years I've climbed up this wall at regular intervals to encourage the plant to grow up and along the wall as it now does, rather than behind the wall as it used to do. This is the view from behind the wall, where my greenhouse is
I've given up climbing up now, as we seem to have the wall pretty well covered.
Also bear in mind that it's extremely easy to propagate this clematis. Internodal cuttings inserted around the edge of a 5" pot in sandy compost will usually root if you take them in June. I also find that layers root naturally on their own from branches which trail down and lie on the ground. So if you live in your house long enough you could probably disappear completely in a veritable forest of pink without very much effort at all.