Stolperstein dedicated to Gregorio Martínez Tundidor

The Stolperstein dedicated to Gregorio Martínez Tundidor is a brass memorial stone set into a pavement in Madrid's Arganzuela district. It commemorates a victim of Nazism — a Spaniard deported to a German concentration camp during the Second World War.

What is this place?

A Stolperstein, literally a "stumbling stone," is a small brass plaque embedded in the pavement outside the last known home of a victim of the Nazi regime. The project was started by German artist Gunter Demnig in the 1990s and now covers hundreds of European cities, ensuring that behind every statistic of loss stands an actual person, an actual street, an actual door. Each plaque is engraved with the victim's name, and often the year of deportation and the name of the camp.

Madrid joined this international memory network by laying stones for residents who, after the Nationalist victory in the Spanish Civil War, fled to France and were later arrested by the German occupation and deported to concentration camps, most commonly to Mauthausen in Austria. More than seven thousand Spaniards passed through that camp, and many did not survive.

How do you get there?

The stone sits on a public pavement in the Arganzuela district, south of central Madrid, close to coordinates 40.401069, -3.691106. The area is well served by the metro and city buses — the easiest approach is to take a nearby metro line to the closest station and cover the last stretch on foot, watching the pavement in front of residential entrances.

What will you see on site?

The stone itself is small, roughly the size of a paving block, and easy to miss if you don't know what you're looking for — which is precisely the point of the project: passers-by "stumble" on the name with their eyes, stop, and read the short inscription. Several such stones lie together in Arganzuela, part of a single memorial initiative dedicated to residents of the district deported by the Nazis. This is not a conventional tourist sight, so visitors are encouraged to approach it quietly and with respect.

When is the best time to visit?

The stone can be viewed at any time, since it lies on an open public pavement with no opening hours. Early morning or late afternoon light works best for reading the inscription and taking a photograph, when the sun isn't directly overhead. It's worth pairing the visit with other memorial stones scattered around Madrid — together they trace a quiet route through the history of the city's Nazi victims.

Frequently asked questions

What exactly is a Stolperstein? It's a brass plaque set into the pavement outside the last home of a Nazi victim, engraved with the person's name and fate. German artist Gunter Demnig has been laying these stones across Europe since the 1990s.

Why is there a stone like this in Madrid? Many Spaniards fled to France after the Civil War, only to be arrested there once Germany occupied it and deported to concentration camps, chiefly Mauthausen. Madrid, like other cities, honors its residents this way.

Is there an entry fee? No — the stone sits on a public pavement and can be visited free of charge at any time.

Are there other similar sites nearby in Madrid? Yes, Arganzuela and other parts of the city hold several Stolpersteine. They can be visited together as a short, reflective route tracing the memory of Nazism's victims.