choose the correct tense

Two paintings by the famous 19th-century French artist Camille Pissarro ¹_____ in a secret room under an old house in Magdeburg, Germany. 

They ²_____ while building 

work ³_____ on the house. 

‘I wanted a new kitchen, and I ⁴_____ at the time,’ said the owner, Wolfgang Brandt. 

But after the old stones on the kitchen floor ⁵_____ , we found stairs down to a secret room. That’s where we found the paintings,’ Mr Brandt told reporters.

Camille Pissarro lived in France, but he escaped to England during the Franco-Prussian war of 1870−71. He had to leave 1,500 of his paintings in France. Most of these paintings ⁶_____ by Prussian soldiers, but some disappeared. 

And they ⁷_____ found − until now. 

At the moment, the paintings ⁸_____ after by a museum in Berlin. 

But after they ⁹_____ , 

they 10_____ back to France.