There were state reasons.

DUCHESS

What state reasons are there
For breaking holy promises to a state?

DUKE

There are wild boars at Pisa in a forest
Close to the city: when I promised Pisa
Unto your noble and most trusting father,
I had forgotten there was hunting there.
At Genoa they say,
Indeed I doubt them not, that the red mullet
Runs larger in the harbour of that town
Than anywhere in Italy.
[Turning to one of the Court.]
You, my lord,
Whose gluttonous appetite is your only god,
Could satisfy our Duchess on that point.

DUCHESS

And Orvieto?

DUKE

[yawning]
I cannot now recall