Casa Dorell located on Triq il-Merkanti is one of the finest palaces in Valletta which was built in the late 16th century. It is a two-storey building having an elevated ground floor with underlying shops and a double height upper floor having an unusual extensive area of bare masonry above the upper floor windows.

The façade is well proportioned although asymmetric having an unequal number of windows flanking the main door with the windows on both levels having Melitan mouldings. A small elliptical aperture, which was a common architectural feature of the period, is located above the main entrance.

The façade is dominated by a wooden balcony supported on four highly carved corbels over the main entrance. The wooden balcony seems to have replaced an earlier open one in stone or wrought iron. Above the balcony is a rectangular stone frame which probably had a coat-of-arms of the owner.

Mepa scheduled Casa Dorell as a Grade 1 national monument as per Government Notice No. 276/08 in the Government Gazette dated March 28.