In which collaboration with Wim Wenders did Bruno Ganz's character fall in love with a character played by Solveig Dommartin? 
Bruno Ganz:  He has collaborated several times with filmmaker Wim Wenders, first as Jonathan Zimmerman in "The American Friend" (1977) and again as Damiel the Angel in both "Wings of Desire" (1987) and "Faraway, So Close! Wings of Desire:  One of the angels, played by Bruno Ganz, falls in love with a beautiful, lonely trapeze artist, played by Solveig Dommartin.
Wings of Desire