Are swords illegal too own in the state of New York I am talking…

hi

here is the NY Law as to what a "deadly weapon" entails. however, if you had such a sword and it is kept in your home, it would not be illegal and no permit is needed. it is only illegal if you take it from your home. you certainly can display and/or collect such a sword

§ 265.01 Criminal possession of a weapon in the fourth degree.
A person is guilty of criminal possession of a weapon in the fourth
degree when:
(1) He or she possesses any firearm, electronic dart gun, electronic
stun gun, gravity knife, switchblade knife, pilum ballistic knife, metal
knuckle knife, cane sword, billy, blackjack, bludgeon, plastic knuckles,
metal knuckles, chuka stick, sand bag, sandclub, wrist-brace type
slingshot or slungshot, shirken or "Kung Fu star"; or
(2) He possesses any dagger, dangerous knife, dirk, razor, stiletto,
imitation pistol, or any other dangerous or deadly instrument or weapon
with intent to use the same unlawfully against another; or
(3) He or she knowingly has in his or her possession a rifle, shotgun
or firearm in or upon a building or grounds, used for educational
purposes, of any school, college or university, except the forestry
lands, wherever located, owned and maintained by the State University of
New York college of environmental science and forestry, or upon a school
bus as defined in section one hundred forty-two of the vehicle and
traffic law, without the written authorization of such educational
institution; or
(4) He possesses a rifle or shotgun and has been convicted of a felony
or serious offense; or
(5) He possesses any dangerous or deadly weapon and is not a citizen
of the United States; or
(6) He is a person who has been certified not suitable to possess a
rifle or shotgun, as defined in subdivision sixteen of section 265.00,
and refuses to yield possession of such rifle or shotgun upon the demand
of a police officer. Whenever a person is certified not suitable to
possess a rifle or shotgun, a member of the police department to which
such certification is made, or of the state police, shall forthwith
seize any rifle or shotgun possessed by such person. A rifle or shotgun
seized as herein provided shall not be destroyed, but shall be delivered
to the headquarters of such police department, or state police, and
there retained until the aforesaid certificate has been rescinded by the
director or physician in charge, or other disposition of such rifle or
shotgun has been ordered or authorized by a court of competent
jurisdiction.
(7) He knowingly possesses a bullet containing an explosive substance
designed to detonate upon impact.
(8) He possesses any armor piercing ammunition with intent to use the
same unlawfully against another.
Criminal possession of a weapon in the fourth degree is a class A
misdemeanor.