Complex sentence: Today some pilgrims still follow in Sigeric's ancient footsteps to Rome on foot, on horseback or by bicycle, however "Via Francigena" pilgrims are far fewer in number than those on the Way of St. James pilgrims' route to Santiago de Compostela in Spain.
Split into simpler sentences: Today some pilgrims still follow in Sigeric's ancient footsteps to Rome on foot, on horseback or by bicycle. However, they are far fewer than on the Way of St. James pilgrims' route to Santiago de Compostela in Spain.