Here's an excert from one of the more interesting, touching and amusing parts of homage to catalonia. The source of the text is here
http://www.netcharles.com/orwell/ an excellent resource...
Below are two photos of cafe Moka and the Poliorama, it was great to find the buildings still standing.
I had just found Kopp and was asking him what we were supposed to do when there was a series of appalling crashes down below. The din was so loud that I made sure someone must be firing at us with a field-gun. Actually it was only hand-grenades, which make double their usual noise when they burst among stone buildings.
Kopp glanced out of the window, cocked his stick behind his back, said: ‘Let us investigate,’ and strolled down the stairs in his usual unconcerned manner, I following. Just inside the doorway a group of Shock Troopers were bowling bombs down the pavement as though playing skittles. The bombs were bursting twenty yards away with a frightful, ear-splitting crash which was mixed up with the banging of rifles. Half across the street, from behind the newspaper kiosk, a head—it was the head of an American militiaman whom I knew well—was sticking up, for all the world like a coconut at a fair. It was only afterwards that I grasped what was really happening. Next door to the P.O.U.M. building there was a café with a hotel above it, called the Café Moka. The day before twenty or thirty armed Civil Guards had entered the café and then, when the fighting started, had suddenly seized the building and barricaded themselves in. Presumably they had been ordered to seize the café as a preliminary to attacking the P.O.U.M. offices later. Early in the morning they had attempted to come out, shots had been exchanged, and one Shock Trooper was badly wounded and a Civil Guard killed. The Civil Guards had fled back into the café, but when the American came down the street they had opened fire on him, though he was not armed. The American had flung himself behind the kiosk for cover, and the Shock Troopers were flinging bombs at the Civil Guards to drive them indoors again.
Kopp took in the scene at a glance, pushed his way forward and hauled back a red-haired German Shock Trooper who was just drawing the pin out of a bomb with his teeth. He shouted to everyone to stand back from the doorway, and told us in several languages that we had got to avoid bloodshed. Then he stepped out on to the pavement and, in sight of the Civil Guards, ostentatiously took off his pistol and laid it on the ground. Two Spanish militia officers did the same, and the three of them walked slowly up to the doorway where the Civil Guards were huddling. It was a thing I would not have done for twenty pounds. They were walking, unarmed, up to men who were frightened out of their wits and had loaded guns in their hands. A Civil Guard, in shirt-sleeves and livid with fright, came out of the door to parley with Kopp. He kept pointing in an agitated manner at two unexploded bombs that were lying on the pavement. Kopp came back and told us we had better touch the bombs off. Lying there, they were a danger to anyone who passed. A Shock Trooper fired his rifle at one of the bombs and burst it, then fired at the other and missed. I asked him to give me his rifle, knelt down and let fly at the second bomb. I also missed it, I am sorry to say.
This was the only shot I fired during the disturbances. The pavement was covered with broken glass from the sign over the Café Moka, and two cars that were parked outside, one of them Kopp’s official car, had been riddled with bullets and their windscreens smashed by bursting bombs.
Kopp took me upstairs again and explained the situation. We had got to defend the P.O.U.M. buildings if they were attacked, but the P.O.U.M. leaders had sent instructions that we were to stand on the defensive and not open fire if we could possibly avoid it. Immediately opposite there was a cinematograph, called the Poliorama, with a museum above it, and at the top, high above the general level of the roofs, a small observatory with twin domes. The domes commanded the street, and a few men posted up there with rifles could prevent any attack on the P.O.U.M. buildings. The caretakers at the cinema were C.N.T. members and would let us come and go. As for the Civil Guards in the Café Moka, there would be no trouble with them; they did not want to fight and would be only too glad to live and let live. Kopp repeated that our orders were not to fire unless we were fired on ourselves or our buildings attacked. I gathered, though he did not say so, that the P.O.U.M. leaders were furious at being dragged into this affair, but felt that they had got to stand by the C.N.T.
They had already placed guards in the observatory. The next three days and nights I spent continuously on the roof of the Poliorama, except for brief intervals when I slipped across to the hotel for meals. I was in no danger, I suffered from nothing worse than hunger and boredom, yet it was one of the most unbearable periods of my whole life. I think few experiences could be more sickening, more disillusioning, or, finally, more nerve-racking than those evil days of street warfare.
I used to sit on the roof marvelling at the folly of it all. From the little windows in the observatory you could see for miles around—vista after vista of tall slender buildings, glass domes, and fantastic curly roofs with brilliant green and copper tiles; over to eastward the glittering pale blue sea—the first glimpse of the sea that I had had since coming to Spain. And the whole huge town of a million people was locked in a sort of violent inertia, a nightmare of noise without movement. The sunlit streets were quite empty. Nothing was happening except the streaming of bullets from barricades and sand-bagged windows. Not a vehicle was stirring in the streets; here and there along the Ramblas the trams stood motionless where their drivers had jumped out of them when the fighting started. And all the while the devilish noise, echoing from thousands of stone buildings, went on and on and on, like a tropical rainstorm. Crack-crack, rattle-rattle, roar—sometimes it died away to a few shots, sometimes it quickened to a deafening fusillade, but it never stopped while daylight lasted, and punctually next dawn it started again.
What the devil was happening, who was fighting whom, and who was winning, was at first very difficult to discover. The people of Barcelona are so used to street-fighting and so familiar with the local geography that they knew by a kind of instinct which political party will hold which streets and which buildings. A foreigner is at a hopeless disadvantage. Looking out from the observatory, I could grasp that the Ramblas, which is one of the principal streets of the town, formed a dividing line. To the right of the Ramblas the working-class quarters were solidly Anarchist; to the left a confused fight was going on among the tortuous by-streets, but on that side the P.S.U.C. and the Civil Guards were more or less in control. Up at our end of the Ramblas, round the Plaza de Cataluña, the position was so complicated that it would have been quite unintelligible if every building had not flown a party flag. The principal landmark here was the Hotel Colón, the headquarters of the P.S.U.C., dominating the Plaza de Cataluña. In a window near the last O but one in the huge ‘Hotel Colón’ that sprawled across its face they had a machine-gun that could sweep the square with deadly effect. A hundred yards to the right of us, down the Ramblas, the J.S.U., the youth league of the P.S.U.C. (corresponding to the Young Communist League in England), were holding a big department store whose sandbagged side-windows fronted our observatory. They had hauled down their red flag and hoisted the Catalan national flag. On the Telephone Exchange, the starting-point of all the trouble, the Catalan national flag and the Anarchist flag were flying side by side. Some kind of temporary compromise had been arrived at there, the exchange was working uninterruptedly and there was no firing from the building. In our position it was strangely peaceful. The Civil Guards in the Café Moka had drawn down the steel curtains and piled up the café furniture to make a barricade. Later half a dozen of them came on to the roof, opposite to ourselves, and built another barricade of mattresses, over which they hung a Catalan national flag. But it was obvious that they had no wish to start a fight. Kopp had made a definite agreement with them: if they did not fire at us we would not fire at them. He had grown quite friendly with the Civil Guards by this time, and had been to visit them several times in the Café Moka. Naturally they had looted everything drinkable the café possessed, and they made Kopp a present of fifteen bottles of beer. In return Kopp had actually given them one of our rifles to make up for one they had somehow lost on the previous day. Nevertheless, it was a queer feeling sitting on that roof. Sometimes I was merely bored with the whole affair, paid no attention to the hellish noise, and spent hours reading a succession of Penguin Library books which, luckily, I had bought a few days earlier; sometimes I was very conscious of the armed men watching me fifty yards away. It was a little like being in the trenches again; several times I caught myself, from force of habit, speaking of the Civil Guards as ‘the Fascists’. There were generally about six of us up there. We placed a man on guard in each of the observatory towers, and the rest of us sat on the lead roof below, where there was no cover except a stone palisade. I was well aware that at any moment the Civil Guards might receive telephone orders to open fire. They had agreed to give us warning before doing so, but there was no certainty that they would keep to their agreement. Only once, however, did trouble look like starting. One of the Civil Guards opposite knelt down and began firing across the barricade. I was on guard in the observatory at the time. I trained my rifle on him and shouted across:
‘Hi! Don’t you shoot at us!’
‘What?’
‘Don’t you fire at us or we’ll fire back!’
‘No, no! I wasn’t firing at you. Look—down there!’
He motioned with his rifle towards the side-street that ran past the bottom of our building. Sure enough, a youth in blue overalls, with a rifle in his hand, was dodging round the corner. Evidently he had just taken a shot at the Civil Guards on the roof.
‘I was firing at him. He fired first.’ (I believe this was true.) ‘We don’t want to shoot you. We’re only workers, the same as you are.’
He made the anti-Fascist salute, which I returned. I shouted across:
‘Have you got any more beer left?’ ‘No, it’s all gone.’