Initial Statement of Beneficial Ownership (3)

FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES	OMB APPROVAL OMB Number: 3235-0104 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^*

WELLS FARGO & COMPANY/MN

2. Date of Event Requiring Statement (MM/DD/YYYY) 4/3/2023

3. Issuer Name and Ticker or Trading Symbol

NUVEEN MUNICIPAL HIGH INCOME OPPORTUNITY FUND [NMZ]

(Last) (First) (Middle)

420 MONTGOMERY STREET

4. Relationship of Reporting Person(s) to Issuer (Check all applicable)

_____ Director ___X___ 10% Owner
_____ Officer (give title below) _____ Other (specify below)

(Street)

SAN FRANCISCO, CA 94104

(City) (State) (Zip)

5. If Amendment, Date Original Filed(MM/DD/YYYY)

6. Individual or Joint/Group Filing(Check Applicable Line)

___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Adjustable Rate MuniFund Term Preferred Shares, Series 2031	1700 ⁽¹⁾	I ⁽²⁾	By Subsidiary ⁽²⁾⁽³⁾

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 4)	2. Date Exercisable and Expiration Date (MM/DD/YYYY)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
1. Title of Derivate Security (Instr. 4)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	4. Conversion or Exercise Price of Derivative Security		6. Nature of Indirect Beneficial Ownership (Instr. 5)

Explanation of Responses:
(1)	The Adjustable Rate MuniFund Term Preferred Shares, Series 2031 ("Shares") reported in Table I represent Shares of which 1,700 Shares are beneficially owned by Wells Fargo Municipal Capital Strategies, LLC ("Capital Strategies"). Capital Strategies is a wholly owned subsidiary of Wells Fargo & Company ("Wells Fargo").
(2)	This statement is jointly filed by Wells Fargo and Capital Strategies. Wells Fargo holds an indirect interest in the Shares listed in Table I by virtue of its indirect ownership of its subsidiary, Capital Strategies.
(3)	Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
WELLS FARGO & COMPANY/MN 420 MONTGOMERY STREET SAN FRANCISCO, CA 94104		X
Wells Fargo Municipal Capital Strategies, LLC 30 HUDSON YARDS NEW YORK, NY 10001		X

Signatures
WELLS FARGO & COMPANY, /s/ Patricia Arce		4/12/2023
^**Signature of Reporting Person		Date
WELLS FARGO MUNICIPAL CAPITAL STRATEGIES, LLC, /s/ Alejandro Piekarewicz		4/12/2023
^**Signature of Reporting Person		Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
*	If the form is filed by more than one reporting person, see Instruction 5(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note:	File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.