Among the earliest Elizabethan plays are Gorboduc (1561) by Sackville and Norton, and Thomas Kyd's The Spanish Tragedy (1592). Gorboduc is notable especially since the first verse drama in English to employ blank verse, and for the way it created elements, from the sooner morality plays and Senecan tragedy, https://family-center.cognitiveinstituteofdallas.org/