Great ! That's exactly what I'm talking about.
I "used to have" a purple ivy geranium merging with a Cl. Colette rose and they looked really nice together...as does your photo.
This was a classic example of my NOT knowing that Colette only grows to about 10' max. in height...hence the geranium.
The geranium froze about 4 years ago so I replaced it with a Cl. Sky's the Limit (yellow) rose. The 2 look "ok" together...but nothing noteworthy. Besides, they both rarely bloom at the same time anyway.
On another arbor I have a Cl. White Iceberg which I planted oppositely with an orange ivy geranium.
The 2 merged very nicely until this summer when the geranium completely FRIED in the heat we had for months on end.
In both cases the geraniums were only there until the roses filled in.
Holy Moly !!! I forgot how HUGE that Cl. Cecile Brunner of yours is !