Since its appearance in the early Greek eras, the art of theater has advanced to touch various human experiences. The classical era was perhaps more attentive to what is tragic, in monitoring wars, and its association with leadership figures to express their dramatic nature in major events, and this is what gave it great appreciation and importance because it is linked to major occasions. 

The plays of Homer, Aeschylus, Euripides, and Aristophanes formed the first classical horizon of theater. 

Theater fully deserved the title: "Father of the Arts," and indeed it is. Besides its narrative-dialogue content that tells a story, whether real or imagined, and the method of its presentation on a stage, it uses sound effects, music, décor, singing, dancing, and a narrator in the theatrical performance. Thus, it includes several arts. Plays used to be written in poetry, and poetry is the peak of dealing with language, thought, imagery, and creativity. 

Ancient Greek theater was born in the city of Athens, Greece, in the sixth century BC, where Greek drama originated within the scope of religious festivals. People used to sing during these festivals in many Greek cities, which led to the emergence of tragic plays that later led to the emergence of comic plays. Both types spread in the ancient Near East to build upon them later the Hellenistic theater and the Roman theater. 

The theater also varied into tragic theater and comic theater. The poems of the poets Archilochus (7th century BC) and Hipponax (6th century BC) contain many humorous scenes, and Aristophanes contributed significantly to founding this art and establishing its pillars. 

Thespis (590 BC) is considered the father of Greek tragedy, as the idea of acting dates back to him in the sixth century BC. It was customary for the leader of the chorus—a group of men up to 15 in number who clap and sing without speaking—to express the events with his tongue before the audience. However, Thespis managed to make the leader play the role of (hypocrites), i.e., the answerer or the person who expresses the opinions of others, and perform various roles accompanied by the actor before the viewers. 

The Greek theater invented a group of mechanisms and artistic techniques that accompany the theatrical performance, including: masks, and it consisted of: the orchestra, which literally means (dance arena) and is considered part of the Greek theater décor, and it is a round place that the chorus used to perform its dances. The theatron consists of rows of stone benches or seats in the shape of a horseshoe, the skene or décor, and the proskenion, which is the place where the actor stands and speaks. 

The theatrical performance includes costumes, lighting, décor and other elements of the theater. As for the play itself, it consists of the prologue, which is the introduction or entrance, and it may come in the form of a monologue or dialogue, then the acting scenes and the choral interlude. 

Shakespearean Drama: 

The issue of theater addressing the borders of human experience appears most clearly and plainly—from the Renaissance to the present—in the theater of the global English poet, man of letters and playwright William Shakespeare (April 26, 1564 – April 23, 1616), who wrote thirty-eight plays that have all been translated into all languages of the world, and his theater is considered today one of the most important theaters in human history.

Shakespeare''s theater has always been global. Not only did he excel over his peers, but he remains contemporary regardless of how much time passes. Many of his plays are still studied today and are re-interpreted in different political and philosophical contexts by virtue of the human and existential issues they addressed.

Among his most prominent works are the plays: Hamlet, Othello, Macbeth, King Lear, and A Midsummer Night''s Dream. They are plays that dealt with many human issues. In some of them, Shakespeare focuses on the idea of losing the ability to distinguish between truth and fiction, which is a recurrent topic in his plays and what drives events in the play. 

Shakespeare continues to review the state of dramatic and tragic uncertainty in "Macbeth," where he presents skepticism again when we see the hero Macbeth, who achieved a massive victory, in scenes depicting several questions: Was Macbeth a criminal and the role of heroism was the transient exception? Or a hero and the role of criminal was the transient exception? We do not know, and Macbeth himself in the fifth act in the fifth scene repeats:

"Life is but a walking shadow, a poor player

That struts and frets his hour upon the stage,

And then is heard no more. It is a tale

Told by an idiot, full of sound and fury, signifying nothing"

It appears to us here that Shakespeare in most of his plays discusses human concerns and provides various human lessons on the scale of the individual and the group, something that has continued even to the modern era in various European theaters, especially the French theater. 

World Theater Day: 

The beginning of the idea of celebrating World Theater Day was in 1961 during the ninth global conference of the International Theatre Institute in the city of "Vienna" in 1961 at the suggestion of the ITI president at that time. The "Finnish Center" of the Institute was commissioned the following year, 1962, to set a world theater day, which is March 27 of each year. 

This date is the date of the opening of the Theater of Nations in 1962 in the theater season in the French city of Paris, which carried the name "Sarah Bernhardt Theater Sarah Bernhardt " where the cultural traditions for the theater festival used to begin on March 27 by presenting theatrical performances for various international theaters. It has become a global tradition to celebrate theater. This International Theatre Institute has about 100 branches distributed throughout the world, and the original founder of this institute is UNESCO in cooperation with public theatrical figures in 1948.

In today''s world, theater plays a major role in monitoring the details of life and creating a dramatic state of human situations and experiences. Theater in Western countries specifically—with its global spread—still has its artistic rules, foundations, and regular cultural traditions. 

In his message on World Theatre Day 2003, the German artist "Tancred Dorst" Tancred  Dorst  : "Theatre is one of the great human inventions that is no less important than the discovery of the wheel and the taming of fire." .. But with technological development and the entry of other competing elements such as cinema, television and digital media, will theater remain a future human artistic act?