Armani will be laid to rest next to his parents and older brother in a family chapel in Rivalta, a village about 100 km (62 miles) south-east of Milan and near the city where he was born, Piacenza.
In a mark of respect, Armani stores will close in the afternoon.
“We will say goodbye to him as a family and then move forward as he would have wanted. Everything is ready to remember him with his fashion,” his partner Pantaleo Dell’Orco was quoted as saying by Corriere della Sera daily.
Right up to his death, Armani was working on a retrospective exhibition and a fashion show to celebrate 50 years of being in business, during Milan Fashion Week in late September. His company has to date not announced any changes to the programme.
“I feel very saddened, because he was a man of great style who, of course, has left an indelible mark… We are definitely losing a great, truly great talent”, Milan resident Alessandra Torchio said on Monday.
Armani died after a five-decade career in which he built a business empire spanning haute couture to home furnishing, with his name becoming synonymous with elegant simplicity.