Serravalle is a picturesque little town but three miles from Pistoja, on the highway to Lucca--as pretty a walk as one could wish to take. It is clustered on the top of a steep hill, and, if somewhat squalid in these later days, its ancient loggia, church, and castle are fine in colour and delightfully irregular and surprising in form. We climb up to the twelfth-century church, which contains a valuable old painting, then round the hill under an imposing loggia, and take our way up to the _rocca_, or castle, which Castruccio built early in the fourteenth century on a spur of the hill, an admirable place of defence, and which answers to its name by closing the valley (_serra valle_). From this vantage-point we have a good view of Pistoja on one side, on the other lies the fertile valley of the Nievole, so often Castruccio's battle-field. The grass is soft and green about the crumbling walls of the old castle now, and clumps of silvery-leaved olive trees, swept by Apennine breezes, brush gently against the old bastions and lofty six-sided tower, which command an outlook over the entire valley. The castle was evidently built out of ruins of earlier buildings, and probably erected in some haste to stay the progress of a dangerous enemy; but it must have been good, honest work to have lasted six hundred years, and Castruccio must have had a genius for building castles and fortresses, not only peculiarly adapted to his own needs of defence, but in such a way as to hold their own down through the centuries, and in their last ruinous state to challenge universal admiration. At Sarzana the fortress he built and named Sarzanello is very different from the one at Serravalle, but perhaps even finer, and one can easily understand why Lorenzo, Il Magnifico, should wish to possess it as a thing of beauty, even had it not been supremely necessary to the northern defences of Florence on the Ligurian coast. It is planted on the brow of a hill overlooking the sea, and is a rather low, battlemented fortress of grey stone, its bastions, towers, and ponderous arches all surrounded by a moat. [Illustration: _Alinari_ APSE END AND CAMPANILE CHURCH OF S. ANDREA, SERRAVALLE] [Illustration: _Alinari_ RUIN OF THE ROCCA OF CASTRUCCIO, SERRAVALLE] [Illustration: _M. M. Newell_ OLIVE TREES]