Voters at a school in Girona clash with riot police who were trying to seize ballot boxes. Agustí Ensesa

These are some of the most-shared images of the referendum day on social networks. The posts appear in order of most shares, but each photo has also been shared by many other accounts.

1. F.C. Barcelona player Gerard Piqué places his vote before the team’s match against Las Palmas. After the game, which was played behind closed doors, Piqué told the media that if there’s a problem, he can “leave the Spanish national team.”

Ja he votat. Junts som imparables defensant la democràcia. pic.twitter.com/mGXf7Qj1TM — Gerard Piqué (@3gerardpique) October 1, 2017

I've already voted. Together we are unstoppable in defending democracy.

2. Gabriel Rufián, member of Spanish Congress from Barcelona, shared this photo of an older woman surrounded by police officers.

Si esto no te da vergüenza es que no la tienes. #CatalanReferendum pic.twitter.com/zTZFnBqchU — Gabriel Rufián (@gabrielrufian) October 1, 2017

If this doesn't make you ashamed, then nothing will. #CatalanReferendum

3. The scientist Eduard Punset – who was also once a Minister of European relations – posted a photo of him casting his vote in one of the plastic ballot boxes.

Democracy is unstoppable.

4. Various Twitter users shared this image of an injured woman. Dani Mateo, an actor and journalist, is one of them. The woman’s son also published a sequence of photos on Instagram, including the moment when his mother finally got to vote.

If I were a politician, after seeing this I would seriously ask myself who I'm serving.

5. The United Left (IU) politician, Alberto Garzón, shared an image of a wounded man on Facebook.

Y esto por querer votar. ¿Y contra los corruptos? Los corruptos son precisamente los que dan las órdenes de golpear. https://t.co/TE3qsYbvpn Gepostet von Alberto Garzón Espinosa am Sonntag, 1. Oktober 2017

And this for wanting to vote.

And what about the corrupt politicians?

The corrupt politicians are precisely those who gave orders to strike.

6. Although the flag is photoshopped into this image, it was one of the most widely shared yesterday. This is the original image.

Foto de Pulitzer. Ho sento, no se qui és l'autor... pic.twitter.com/RAFHGYiumH — Josep M. Mainat 🎗🌊 (@MainatJM) October 1, 2017

A Pulitzer photo. Sorry, I don't know who the photographer is...

7. The image of this woman, detained by several officers, was widely shared, particularly by international media. This tweet from the film director and actor Paco León was one of the most popular, but there were many others.

How shameful!

8. This next photo is of a firefighter protecting people from police officers.

Cuando os pregunten qué significa tener conciencia de clase enseñad esto pic.twitter.com/lzuhDJ1yJ6 — Doctor Rojo (@doctor_rojo) October 1, 2017

When they ask what it means to have class consciousness, teach this

9. A man is seen hugging a Catalan police officer. Boris Llona took the photo in Lleida, a city in western Catalonia.

🔴 Mosso plorant avui a Cappont, Lleida. Foto: B.Ll. Més imatges a https://www.segre.com/multimedia/galeries-imatges/carregues_policials_lleida.html Gepostet von Segre am Sonntag, 1. Oktober 2017

A Catalan police officer crying today in the Cappont neighborhood of Lleida

10. Firefighters were deployed in various parts of Catalonia to help citizens who wanted to vote, as shown in this image.

Los bomberos protegiendo a la gente que quiere votar. Bravo 👏👏👏 #CatalanReferendum pic.twitter.com/ELLzRw6cw2 — ℒuis🔻 (@LuisMadriz_) October 1, 2017

Firefighters protecting people that want to vote. Bravo #CatalanReferendum

11. The woman who appeared in Rufián’s tweet also appeared all over social media, this time with various National Police officers in the background.

This photo.

12. Several officers surround a woman during the clearing out of a polling center.

These images will be shared around the around the world. There are 1,500 international media reporters here.

Estas imágenes van a dar la vuelta al mundo. Aquí estamos 1.500 periodistas de medios internacionales. pic.twitter.com/C6SyBtgZIB — Vicent Montagud (@vicentmontagud) October 1, 2017

13. These firefighters stand between the demonstrators and the Civil Guard. Throughout the day there were several scenes of tension between agents from the two groups.

#CatalanReferendum Los bomberos defienden a los ciudadanos de la brutalidad policial. Bravo! Volem votar! pic.twitter.com/a6aWeRpdJB — MariaBlack (@MariaBlack__) October 1, 2017

#CatalanReferendum Firefighters are defending citizens against police brutality. Bravo! We want to vote!

14. Sandwiched between the rest of these tense images was a post from the National Police of four images on Twitter of their agents completing their job of stopping the illegal referendum.

Agents confiscate ballot boxes and ballot sheets at different schools in Barcelona. We comply with the law #WeareforYOU

Agentes intervienen urnas y papeletas en distintos colegios de #Barcelona. Cumplimos la legalidad #EstamosporTI pic.twitter.com/kqg3LyW7jc — Policía Nacional (@policia) October 1, 2017

15. Former Catalan Parliament member, Antonio Baños, shared a photo of the moment when a police officer confiscated a ballot box.

Esto os gusta? Era esto? Qué es lo que sigue? pic.twitter.com/FAtraks4Tl — Antonio Baños (@antoniobanos_) October 1, 2017

Do you like this? Is this what you wanted? What's next?