Complex sentence: Her discovery of the Cross along with Constantine is dramatised in the "Santacruzan", a ritual pageant in the Philippines held in May (when Roodmas was once celebrated) that bears elements of the month's Marian devotions.
Split into simpler sentences: Her discovery of the Cross along with Constantine is dramatised in the "Santacruzan", a ritual pageant in the Philippines. Held in May (when Roodmas was once celebrated), the procession also bears elements of the month's Marian devotions.