Buenos Aires, City of Arrivals

The Jews who built Buenos Aires arrived by ship, and the ship is the key to the whole story. Other diaspora communities grew slowly over centuries, layered into a city's stone. This one came fast, in a single great wave off the Atlantic, mostly between the 1880s and the 1930s, pouring out of the steamers from Russia, Poland and the Ottoman lands into a young republic that was advertising for newcomers. Within two generations a community that had barely existed became the largest Jewish population in Latin America and one of the great Jewish cities of the world.

It is tempting to call it accidental - the right boats arriving at the right port at the right moment. It was not. Argentina actively recruited European immigrants to fill its land and labour, and a remarkable rescue project pointed Jewish migration its way. The result was a community that did not drift into being. It was built, on purpose, at speed, by people who knew exactly how little time history tends to give.

The Baron's gamble

The turning point came in 1889, when a ship called the Weser landed several hundred Russian Jews who founded an agricultural colony on the pampas. They were the first of a far larger movement. In 1891 the German-Jewish philanthropist Baron Maurice de Hirsch established the Jewish Colonization Association and bought vast tracts of Argentine land, settling tens of thousands of Jews fleeing the pogroms of the Russian Empire on farming colonies across the country. They became, famously, Jewish gauchos - Yiddish-speaking cowboys on the South American plain, an image so improbable it sounds invented, and was not.

The colonies were the seed; the city was the harvest. Over time the children and grandchildren of the gauchos drifted to Buenos Aires, where the real Jewish metropolis took shape. Whole neighbourhoods - Once above all - filled with Jewish shops, schools, theatres, newspapers and synagogues. Yiddish theatre played to packed houses; Hebrew and Yiddish presses ran; mutual-aid societies, libraries and political movements multiplied. The community arrived as refugees and built, within a generation, an entire public culture in a new language under a new sky.

Visibility, and its price

A community that grows this fast and this publicly draws hostility as well as admiration. In January 1919, during the brutal suppression of a general strike known as the Semana Trágica, the "Tragic Week", the violence turned specifically anti-Jewish. Vigilante mobs and elements of the security forces attacked the heavily Jewish Once neighbourhood, beating residents and ransacking property, in what is sometimes described as the only pogrom in the Americas. The exact toll has long been disputed and the higher figures are doubted, but the character of the episode is not: Jews were singled out and assaulted on the streets of their own city.

The community did not retreat into invisibility, and that refusal is the point. It kept building - more schools, more newspapers, more institutions - and remained one of the most organised diasporas in the world. Buenos Aires has known later tragedies too, including the bombing of the AMIA Jewish community centre in 1994, and through all of it the community has stayed put, stayed loud, and stayed itself. Vigilance, here, has never meant hiding.

The city of arrivals, still

Today Buenos Aires remains the great Jewish metropolis of Spanish America - the largest Jewish community in Latin America, with its synagogues, schools, sports clubs, theatres and a Jewish quarter in Once that still hums. The accents have changed and the language is now mostly Spanish, but the underlying character has not. This is a community that defines itself by movement: arrival, building, and the determination to stay.

That is what the port left behind. A city where, for more than a century, the future kept arriving by boat - and the people who stepped off the gangways decided, again and again, that they had come not to pass through but to belong. The port keeps opening the door.