Here’s a history lesson.
The first recorded history of doors was found in Egyptian tomb paintings 4000 year’s ago. Know one knows who invented the door, only that it was first incepted somewhere in central Egypt. In agent Egyptian architecture, a false door was a wall decoration that looked like a window, it was common in tombs and represented a gate to the afterlife.
In Biblical times, King King Solomon’s temple doors were made of Olive-wood, as were many doors of the past. In India, there are ancient doors made out of stone that were creatively designed with stone pivots to swing open.

As time progressed and advancements were made, the Romans used their creative architectural minds to create more advanced doors. These doors were usually made out of bronze and included the use of single, double, sliding, and folding doors.
In Roman Religion, Janus was the Roman god of doors and archways. As the Romans were suspicious people, during times of war, there were lucky and unlucky ways for an army to march through a janus (door). The Janus Germinus is a famous door in Rome, a shrine for the Roman god Janus. It stands as a simple rectangular bronze structure with double doors at each end and was closed during times of peace, open during times of war.
The first recorded automatic door was created 1st century AD during the era of Roman Egypt by a Greek scholar known as Heron of Alexandria. If we’re talking about ingenuity, leave it to the Chinese to create the first foot-sensor-activated door during the reign of Emperor of Yang of Sui, ruling from 604 to 618.

During the 12th and 13th century in medieval times, “The Symbol At Your Door” was significant. Differing seals could stand for reputation, prestige, status and wealth. These doors were created from whatever material was available in the region and copper and bronze were integral materials for medieval architecture — the base material for doors were mainly strong oak.
Whether the door was for a a cathedral or a castle, they were constructed in a plywood fashion and would be held together with steel studs, reinforced with steel iron bands — meant to proof against small forces.

Craftsmanship was at it’s finest in the 16th and 17th century, in a time period known as the renaissance. This era was considered the bridge between the Middle Ages and modern history. It was a time when intellectual pursuits prevailed and art techniques were refined by masters like Michelangelo and Da Vinci. Classical Greek designs were incorporated into cathedrals and monuments to bring forth a new realism in sculpture and craftsmanship.
Spanish style renaissance doors were studded with hundreds of hand-forged iron clavos or nails. Tuscan style doors from the hills of Italy were of great beauty, their borders were adorned with figures, birds and foliage. In many of the doors, rectangular panels were filled with bas-reliefs (sculpture, carving, or mold) in which scripture subjects are illustrated with innumerable figures. Michelangelo described these doors as the “gates to paradise.”

As religion reigned supreme during this era, the finest French renaissance doors were first created for cathedrals. Characterized by their Gothic details, coats of arms, and/or royal and period motifs, French doors were mainly carved from fine ceder wood. The most majestic doors had high canopies and double range of niches ( classical architecture reduced in size, retaining the half-dome) with figures.
Years later, French doors were enriched with bas-reliefs, landscapes, figures and elaborate interlaced borders.
Doors have been symbolic and evolved stylistically in various cultures for
centuries.
Culled from medium.com

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I can't believe that I just read the history of door (s).

Real estate investing, even on a very small scale, remains a tried and true means of building an individual's cash flow and wealth"
~Robert Kiyosaki

It’s tangible, it’s solid, it’s beautiful. It’s artistic, from my standpoint, and I just love real estate.” ~Donald Trump

All that you do in this new month shall be productive and successful. I want you to know that every challenge/trial/temptation that comes your way in this month will not impede your progress but serve as a stepping stone to greater heights. You will soar above every failure and disappointment, in this new month you shall experience joy unfathomable and divine peace.

I wish you a Happy and Blessed New Month�

“If you don’t own a home, buy one. If you own a home, buy another one. If you own two homes, buy a third. And, lend your relatives the money to buy a home.”
John Paulson, investor and multi-billionaire

Real estate investing, even on a very small scale, remains a tried and true means of building an individual's cash flow and wealth"
~Robert Kiyosaki

May the Lord strengthen you to walk through the valleys of this month with grace. May He grant you the courage to shoulder your responsibilities with candour and enjoy the blessings with humility. May the Lord who knows the end from the beginning make every crooked way smooth for you and May he bestow upon you the divine peace and wisdom which will enable you to smile through the trials for they are not "problems" as the rest of the world thinks but stepping stones to the exalted position that the Almighty has prepared for you.

I wish you a Happy New month, remain blessed.

“Everyone wants a piece of land. It’s the only sure investment. It can never depreciate like a car or a washing machine. Land will double its value in ten years or in less than that. Land is going up every day.” -SAM SHEPARD, Curse of the Starving Class

“The best investment on earth is earth.”Louis Glickman

Find out where the people are going and buy the land before they get there.” ~William Penn Adair

“If you’re not going to put money in real estate, where else?” - Tamir Sapir, business mogul

“Now, one thing I tell everyone is learn about real estate. Repeat after me: real estate provides the highest returns, the greatest values and the least risk.” - Armstrong Williams, entrepreneur

“Everyone wants a piece of land. It’s the only sure investment. It can never depreciate like a car or a washing machine. Land will double its value in ten years or in less than that. Land is going up every day.” -SAM SHEPARD, Curse of the Starving Class

“Now, one thing I tell everyone is learn about real estate. Repeat after me: real estate provides the highest returns, the greatest values and the least risk.” - Armstrong Williams, entrepreneur

“The wise young man or wage earner of today invests his money in real estate.” Andrew Carnegie