Berlin, Germany-After decades of quietly selling fruit and vegetables, a family-run Turkish grocery shop has become the unlikely flashpoint in a Berlin culture war pitting a neighbourhood against property developers.

No-one is more surprised than its owner, Ahmet Caliskan, 55, who received an eviction notice in March but has since been heartened by an outpouring of support from the people of his colourful, bohemian district of Kreuzberg.

Weekly rallies have made his shop a symbol in the battle against gentrification -- the trend where fashionable low-cost city districts attract moneyed newcomers who drive up rents and prices, in turn forcing out low-income families, students and pensioners.

Caliskan's humble "Bizim Bakkal" ("Our Grocery") opened 28 years ago, in the days when the Cold War split Germany's biggest city in two and Kreuzberg was a gritty working class district in the shadow of the Berlin Wall.

It has long been a centre for Turkish migrants, earning it the nickname "Little Istanbul", as well as a hub for a colourful mix of students, artists and musicians who formed a burgeoning hippie and punk-rock scene.

With its fashionable street cred, Kreuzberg changed from one of Berlin's poorest districts into a magnet for free-spirited party people and tourists drawn by its mural-covered buildings, permissive club culture and cosmopolitan vibe.

Today millions flock every year to the bars, techno clubs and shisha cafes of one of Berlin's trendiest areas, which hosts all-night dance parties and an annual Carnival of Cultures event and, uniquely in Berlin, has directly elected a Green Party lawmaker to parliament.

- 'People can't pay' - 

Since the Berlin Wall fell a quarter-century ago, Kreuzberg has moved from the geographical margins of West Berlin to the centre of a reunified city -- another factor which has driven both its popularity and its real estate prices.

Although Berlin rents and property costs are still far lower than in Paris and London, they have shot up recently, rising 46 percent across the city between 2009 and 2015, and by 54 percent in Kreuzberg during the same six years.

Caliskan has witnessed the change since he came to Germany at age 14 to join his father, who had for years laboured in German industry as part of a post-war "guest worker" programme.

The family opened the shop on the ground floor of a four-storey building in Kreuzberg's Wrangelstrasse, selling an assortment of produce ranging from cucumbers and olives to goat cheese and kitchen herbs.

Since then the shop has sustained the family, now employing Caliskan, his wife, Emine, 55, and their son Sukru, 23. Their 27-year-old daughter is studying biochemistry.

The eviction notice came in late March, ordering the business to vacate the premises by September 30.

"I am shocked," Caliskan told AFP, his eyes smiling but marked by dark rings of fatigue.

"The lawyers say there is little chance of winning. I don't want to rely on social services, I want to earn my own money. But at 55 years old..."

Caliskan said he tried to negotiate a new lease with the company, which plans to renovate the building and let out the apartments at higher rents. The company could not be reached for comment by AFP.

Berlin recently introduced caps for annual rent hikes -- but this won't help the family because it doesn't apply to brand-new or extensively renovated buildings.

"People can't pay. This is an expulsion!" growled Sukru, castigating the investors for being driven "by money and profit".

- 'Je suis Bizim Bakkal' - 

The investors' plans "will destroy their lives, but they don't care," sighed a local teacher who has taken up the family's cause against the forces of gentrification, which critics charge is changing the face of Berlin, a city that long prided itself on its mixed-income neighbourhoods and egalitarian spirit.

The teacher, who asked not to be named in print, and many of the shop's other loyal customers have staged rallies outside for the past three Wednesdays, with people filling the pavement, sitting atop cars and sharing their message using megaphones, posters and stickers.

Banners of support carry messages such as "Bizim Bakkal Must Stay" and "Je suis Bizim Bakkal", borrowing the slogan from the solidarity campaign with the victims of the Paris jihadist attacks against the Charlie Hebdo satirical magazine.

The city's left-wing Tageszeitung daily likened the plan to close the neighbourhood's oldest greengrocer to the loss of a cultural icon like a church tower and said "we would call that barbarism. And there's a lot we would do to stop it".

For now Caliskan hasn't given up, predicting with a wry smile that "on October 1, we will still be here".