Complex sentence: Originally a monastery, in the 19th century, Baron Baratta revived the wreck, converting it into a family summer house, then transformed in 1901 by Mr Ruggero Valentini, the pioneer of tourism in Portofino, into the Grand Hotel Splendid.
Split into simpler sentences: Originally a monastery, in the 19th century, Baron Baratta revived the wreck, converting it into a family summer house. In 1901 the building was transformed by Mr Ruggero Valentini, the pioneer of tourism in Portofino, into the Grand Hotel Splendid.