Contrary to what can be read elswhere online, the Military hospital for prisoners of War, H202,  was set up in THE CITY OF LUCCA in August 1942.  The  original documentation can be found on website https://www.campfascisti.it.

HERE IS A TRANSLATION:

Ministry of Defence

Prisoners of War Office

Protocol 41846

8 August 1942

To the War Cabinet

Copy to the War Ministry Engineering Section

…..in accordance with the agreement made on the 6th of this current month we wish to inform the interested parties that the the Territorial Defence (Florence) has selected part of the old hospital at Lucca as the location for the military hospital. With the measures that have been adopted and the works agreed on, which are already underway, it has been possible to isolate the camp and guarantee a complete surveillance such as to guard against possible escapes.

Works already carried out are as follows:

Double barbed wire fences in the courtyards

The raising of the external boundary walls

The closing of all communications with the civil hospital and its cellars

The setting up of watchtowers, electrical alarms and external lighting

Barracks, kitchens and lavatories have been set up for the guards and the services

The electrical system has been updated, the roofs have been repaired, and various internal structures have been repaired or altered

These works, which are almost finished, will have cost L.400.000 excluding the barracks, the barbed wire, the kitchens, the wood for fixtures and fittings and the pipework, all supplied by the territorial defence of Florence.

109351 Bombardier Harry Rose-Innes, 5th Battery, 2nd  Light Anti-Aircraft Regiment, SAA, who was transferred to the hospital from PG 60 in the Autumn of '43, (see 'Moving on') had this to say about it in his book  

'The Po Valley Break: the true story of three POWs and their bid for freedom in Mussolini's Italy', Valiant publishers, 1976

The main road he is referring to passed through the city walls at San Donato. He would have been looking out of one of the above windows. The unmade road is now the green area in the above photograph:

890 Maurice Muir

Regimental Stretcher Bearer, 24 Battalion,  2 New Zealand Division

 - Captured on 1st December 1941 at Sidi Rezegh in North Africa,  he was awarded the MM for protecting his Regimental Aid Pos  from friendly fire.
 - He was transported to Italy as a POW, initially to Capua (Campo 66) near Naples, then to Campo 52 in early – mid February 1942, He subsequently was moved in 1942 to Campo 202 to work as a Medical Orderly in the newly established POW Hospital in Lucca.
 - In April 1943 he was repatriated to the United Kingdom with a party of about 400 wounded and protected personnel. He was 1 of 15 New Zealanders in the party.

His son Geoff with his wife Glennys visited the old hospital in 2017 and upon explaining who they were they were  shown inside. The building is now part of the Judiciary.