Lagerfeld first started working with the Italian fashion label in 1965.
All guests attending the show were provided with mementos on their seats, which included a note marking the date of Lagerfeld's death and copies of the German fashion designer's last sketches for Fendi.
In 2016, Lagerfeld spoke to Harper's Bazaar about the significance of working with Fendi for more than five decades.
"It's the longest collaboration in fashion," he said.
"No one has lived long enough to do it for such a long time, and I'm not tired of it at all."
Click through the gallery below to see all the celebrities who attended Fendi's autumn/winter 2019 runway show:
A spokesperson for Lagerfeld's eponymous brand recently confirmed that the designer's wishes to be cremated "will be respected".
It's also been reported that the designer's cat Choupette may inherit some of his £150m fortune.