Germany's 'luxury bishop' makes plea to Pope Francis
Franz-Peter Tebartz-van Elst - dubbed the "Luxury Bishop" - is facing calls for his resignation after spending 31m euros (£26m; $42m) on his residence.
He is also accused of lying about the over-spend on the property in Limburg.
In Rome, he will meet the head of the Catholic Church in Germany, Archbishop Robert Zollitsch. It is not clear if Pope Francis will intervene.
Since taking office in March, Pope Francis has urged the Church to promote a lifestyle of frugality and simplicity.