...from the same city
As I am a Rhymer
And now at least a merry one,
Mr. Mum's Rudesheimer
And the church of St. Geryon
Are the two things alone
That deserve to be known
In the body-and-soul-stinking town of Cologne.
St Gereon is a medieval church in the Romanesque style.
Poetry Atlas has many other poems about Cologne and poems about Germany.