The 63-year-old, who has lived in Moscow for two decades and has designed major projects for the Russian president, is currently a fugitive of Italian justice and an international arrest warrant has been put out for him.

A few days ago the supreme Court of Cassation overturned an order under which around 141 million euros worth of assets had been seized from Cirillo.

Cirillo's wife is also on trial along with four other people in relation to the case, including two Russian nationals.

Cirillo is a founder and a co-owner of an architectural studio, Masterskaja, in Moscow.

In 2014, he received Russian citizenship after more than 20 years of residence in the country.

"Russia is my home. I have my work here, my interests and my main relations," Cirillo said last month.

"At the moment I have no reason, nor desire, to return to Italy, given the treatment that has been given to me".

It is believed Cirillo hopes to win the rights to design a sprawling new parliament building in Moscow, joining the esteemed collection of Italian architects who have designed landmark Russian seats of power over the centuries -- including Moscow's iconic Kremlin and the Winter Palace in St. Petersburg.

ANSA